DavMail is a POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client (e.g. Thunderbird with Lightning or Apple iCal) with an Exchange server, even from the internet or behind a firewall through Outlook Web Access. DavMail now includes an LDAP gateway to Exchange global address book and user personal contacts to allow recipient address completion in mail compose window and full calendar support with attendees free/busy display. 
The main goal of DavMail is to provide standard compliant protocols in front of proprietary Exchange. This means LDAP for global address book, SMTP to send messages, IMAP to browse messages on the server in any folder, POP to retrieve inbox messages only, Caldav for calendar support and Carddav for personal contacts sync. Thus any standard compliant client can be used with Microsoft Exchange.

DavMail is a POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client (e.g. Thunderbird with Lightning or Apple iCal) with an Exchange server, even from the internet or behind a firewall through Outlook Web Access. DavMail now includes an LDAP gateway to Exchange global address book and user personal contacts to allow recipient address completion in mail compose window and full calendar support with attendees free/busy display. 

DavMail - POP/IMAP/SMTP/Caldav to Exchange

ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications. 

 The name space provided by ZooKeeper is much like that of a standard file system. A name is a sequence of path elements separated by a slash (/). Every node in ZooKeeper's name space is identified by a path. ZooKeeper supports the concept of watches. Clients can set a watch on a znodes. A watch will be triggered and removed when the znode changes. It supports replication. 

 In case of distributed system, there may be multiple servers interacting with each other. Few may need to share some common resources. Consider a scenario, where a application server wants to know the list of database servers, then it could communicate the Zookeeper server and fetch the required information.

ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications.

ZooKeeper - Centralized service for maintaining configuration information

The JavaMail API is a set of abstract APIs that model a mail system. The API provides a platform independent and protocol independent framework to build Java technology based email client applications. The JavaMail API provides facilities for reading and sending email. Service providers implement particular protocols. Several service providers are included with the JavaMail API package; others are available separately. 
 
The JavaMail reference implementation jar file, includes SMTP, IMAP, and POP3 protocol providers.

The JavaMail API is a set of abstract APIs that model a mail system. The API provides a platform independent and protocol independent framework to build Java technology based email client applications. The JavaMail API provides facilities for reading and sending email. Service providers implement particular protocols. Several service providers are included with the JavaMail API package; others are available separately. 

JavaMail - Java library to build Mail and Messaging Applications

Bazel is a build tool that builds code quickly and reliably. It is used to build the majority of Google's software, and thus it has been designed to handle build problems present in Google's development environment. A comprehensive, built-in set of rules lets you build software for a wide variety of languages and platforms right out of the box.

Bazel - Google's own build tool

Jodd is developer-friendly set of Java microframeworks, tools and utilities, under 1.7 MB. Build with common sense to make things simple, but not simpler. Its feature include slick IoC container, elegant MVC framework, unique AOP engine, thin DB-object mapper, standalone transaction manager, focused validation tool, versatile HTML parsers, pages decorator, super properties, powerful BeanUtil, timeless JDateTime, easy email, many super utilities... and more. 
Tools and utilities: 
<ul>
<li><code>jodd-core</code> contains many utilities, including <code>JDateTime</code>.</li>
<li><code>jodd-bean</code>, our infamous <code>BeanUtil</code>, type inspectors and converters.</li>
<li><code>jodd-props</code> is the super-replacement for Java <code>Properties</code>.</li>
<li><code>jodd-mail</code> for easier email sending.</li>
<li><code>jodd-upload</code>, handles HTTP uploads.</li>
<li><code>jodd-servlet</code> with many servlet utilities, including nice tag library.</li>
<li><code>jodd-http</code>, tiny HTTP client.</li>
</ul>
Micro-frameworks:

<ul>
<li><code>jodd-madvoc</code> - slick MVC framework.</li>
<li><code>jodd-petite</code> - pragmatic DI container.</li>
<li><code>jodd-lagarto</code> - HTML parser with <code>Jerry</code> and <code>CSSelly</code>.</li>
<li><code>jodd-decora</code> - pages decorator.</li>
<li><code>jodd-htmlstapler</code> - static page resources handler.</li>
<li><code>jodd-proxetta</code> - dynamic proxies and <code>Paramo</code>.</li>
<li><code>jodd-db</code> - thin database layer and object mapper.</li>
<li><code>jodd-json</code> - JSON parser and serializer.</li>
<li><code>jodd-vtor</code> - validation framework.</li>
<li><code>jodd-jtx</code> - transactions management.</li>
</ul>

Jodd is developer-friendly set of Java microframeworks, tools and utilities, under 1.7 MB. Build with common sense to make things simple, but not simpler. Its feature include slick IoC container, elegant MVC framework, unique AOP engine, thin DB-object mapper, standalone transaction manager, focused validation tool, versatile HTML parsers, pages decorator, super properties, powerful BeanUtil, timeless JDateTime, easy email, many super utilities... and more. 

Jodd - The Unbearable Lightness of Java

James (a.k.a Java Apache Mail Enterprise Server) is a 100% pure Java SMTP and POP3 Mail server, and NNTP News server designed to be a complete and portable enterprise mail/messaging engine solution based on currently available open messaging protocols. 
 <ul><li>Is 100% pure java capable of running on Java 1.4 onwards</li>
<li>Integrates protocols
 <ul><li>Email
 <ul><li><a href="http://james.apache.org/server/rfclist/smtp/rfc0821.txt" class="externalLink"><abbr title="Simple Mail Transport Protocol">SMTP</abbr></a></li>
<li><a href="http://james.apache.org/server/rfclist/pop3/rfc1725.txt" class="externalLink"><abbr title="Post Office Protocol">POP3</abbr></a><ul><li>Outgoing server</li>
<li>Incoming from POP3 accounts (FetchMail)</li>
</ul>
</li>
<li><a href="http://james.apache.org/server/rfclist/imap4/rfc2060.txt" class="externalLink"><abbr title="Internet Message Access Protocol">IMAP</abbr></a> (James 3)
 <ul><li>Server</li>
<li><a href="http://james.apache.org/jsieve" class="externalLink">Sieve</a> 
 filtering into IMAP mailboxes for incoming mail</li>
</ul>
</li>
</ul>
</li>
</ul>
<ul><li><a href="http://james.apache.org/server/rfclist/nntp/rfc0977.txt" class="externalLink"><abbr title="Network News Transfer Protocol">NNTP</abbr></a> (better known as news)</li>
</ul>
</li>
<li>Is based on open standards</li>
<li>Is a mailet container. Processing is delegated to independent, extensible, pluggable agents
 specified by the <a href="http://james.apache.org/mailet/api" class="externalLink">Mailet API</a>. Any function
 which is not already available (from <a href="http://james.apache.org/mailet" class="externalLink">James</a>
 or from a third party) can be developed.</li>
<li>Is a modular, component based <a href="http://dbpedia.org/resource/Inversion_of_control" class="externalLink">IoC</a> 
 mail platform
 <ul><li>Based on mature, production proved <a href="http://excalibur.apache.org" class="externalLink">Apache Excalibur</a>
 components</li>
<li>James 2 (production) uses the <a href="http://avalon.apache.org" class="externalLink">Avalon</a> framework. Avalon development
 has now stopped but the framework is mature, stable and of proved production quality.</li>
<li><a href="http://james.apache.org/server/head" class="externalLink">James 3</a> (development) supports Spring and is moving
 towards OSGI</li>
</ul>
</li>
<li>Support to create mailing list </li>

</ul>

James (a.k.a Java Apache Mail Enterprise Server) is a 100% pure Java SMTP and POP3 Mail server, and NNTP News server designed to be a complete and portable enterprise mail/messaging engine solution based on currently available open messaging protocols.

James - Enterprise Mail Server

Signal sends high-quality group, text, voice, video, document, and picture messages anywhere in the world. Signal messages and calls are always end-to-end encrypted and painstakingly engineered to keep your communication safe. 

Signal - Secure Messaging

Elasticsearch is a distributed, RESTful search and analytics engine capable of solving a growing number of use cases. As the heart of the Elastic Stack, it centrally stores your data so you can discover the expected and uncover the unexpected. 
 
 Its feature include: 
 <ul>
	<li>Distributed and Highly Available Search Engine.
	<ul>
		<li>Each index is fully sharded with a configurable number of shards.</li>
		<li>Each shard can have one or more replicas.</li>
		<li>Read / Search operations performed on either one of the replica shard.</li>
	</ul></li>
	<li>Multi Tenant with Multi Types.
	<ul>
		<li>Support for more than one index.</li>
		<li>Support for more than one type per index.</li>
		<li>Index level configuration (number of shards, index storage, &#8230;).</li>
	</ul></li>
	<li>Various set of APIs
	<ul>
		<li>HTTP RESTful API</li>
		<li>Native Java API.</li>
		<li>All APIs perform automatic node operation rerouting.</li>
	</ul></li>
	<li>Document oriented
	<ul>
		<li>No need for upfront schema definition.</li>
		<li>Schema can be defined per type for customization of the indexing process.</li>
	</ul></li>
	<li>Reliable, Asynchronous Write Behind for long term persistency.</li>
	<li>(Near) Real Time Search.</li>
	<li>Built on top of Lucene
	<ul>
		<li>Each shard is a fully functional Lucene index</li>
		<li>All the power of Lucene easily exposed through simple configuration / plugins.</li>
	</ul></li>
	<li>Per operation consistency
	<ul>
		<li>Single document level operations are atomic, consistent, isolated and durable.</li>
	</ul></li>
</ul>

Elasticsearch is a distributed, RESTful search and analytics engine capable of solving a growing number of use cases. As the heart of the Elastic Stack, it centrally stores your data so you can discover the expected and uncover the unexpected. 

ElasticSearch - Distributed, RESTful search and analytics engine

JCommander is a very small Java framework that makes it trivial to parse command line parameters. You annotate fields with descriptions of your options.


JCommander - Command line parsing framework for Java

JLine is a Java library for handling console input. It is similar in functionality to BSD editline and GNU readline. People familiar with the readline/editline capabilities for modern shells (such as bash and tcsh) will find most of the command editing features of JLine to be familiar. Its features include Command history, Command completion using tab, Custom key binding etc.

JLine - Java console input library

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

Netty - Event-driven Asynchronous Network Application Framework

An application metrics facade for the most popular monitoring tools. Instrument your code with dimensional metrics with a vendor neutral interface and decide on the monitoring backend at the last minute. Micrometer is the instrumentation library underpinning Spring Boot 2.0's metrics collection.
 
As an instrumentation facade, Micrometer allows you to instrument your code with dimensional metrics with a vendor-neutral interface and decide on the monitoring system as a last step. Instrumenting your core library code with Micrometer allows the libraries to be included in applications that ship metrics to different backends. It supports out-of-the-box instrumentation of caches, the class loader, garbage collection, processor utilization, thread pools, and more tailored to actionable insight.

 An application metrics facade for the most popular monitoring tools. Instrument your code with dimensional metrics with a vendor neutral interface and decide on the monitoring backend at the last minute. Micrometer is the instrumentation library underpinning Spring Boot 2.0's metrics collection.

Micrometer - An application metrics facade for the most popular monitoring tools

ExoPlayer is an application level media player for Android. It provides an alternative to Android’s MediaPlayer API for playing audio and video both locally and over the internet. ExoPlayer supports features not currently supported by Android’s MediaPlayer API (as of KitKat), including DASH and SmoothStreaming adaptive playbacks, persistent caching and custom renderers.

ExoPlayer - Media Player for Android

Eclipse Che is a developer workspace server and cloud IDE. Che defines workspaces that include their dependencies including embedded containerized runtimes, Web IDE, and project code. This makes workspaces distributed, collaborative, and portable to run anywhere on a desktop or a server. All Che services are reachable through RESTful APIs. 

Eclipse Che - Next-Generation IDE

BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering amp; geometric analyses, network distributed framebuffer support, image & signal-processing tools.
 
BRL-CAD supports a wide variety of geometric representations, including an extensive set of traditional implicit "primitive shapes" (such as boxes, ellipsoids, cones, and tori) as well as explicit primitives made from collections of uniform B-spline surfaces, non-uniform rational B-spline (NURBS) surfaces, n-manifold geometry (NMG), and purely faceted polygonal mesh geometry. All geometric objects may be combined using boolean set-theoretic CSG operations such as union, intersection and difference.

BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering amp; geometric analyses, network distributed framebuffer support, image & signal-processing tools.

BRL-CAD - Solid Modeling System

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