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

 rkt (pronounced like a "rocket") is a CLI for running application containers on Linux. rkt is designed to be secure, composable, and standards-based. The rkt v1.x series provides command line user interface and on-disk data structures stability for external development. Any major changes to those primary areas will be clearly communicated, and a formal deprecation process conducted for any retired features.

rkt - the pod-native container engine for Linux

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

An open platform to connect, manage, and secure microservices.Istio is an open platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio's control plane provides an abstraction layer over the underlying cluster management platform, such as Kubernetes, Mesos, etc.

An open platform to connect, manage, and secure microservices. Istio is an open platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio's control plane provides an abstraction layer over the underlying cluster management platform, such as Kubernetes, Mesos, etc.

Istio - An open platform to connect, manage, and secure microservices

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

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

TensorFlow is a library for numerical computation using data flow graphs. Nodes in the graph represent mathematical operations, while the graph edges represent the multidimensional data arrays (tensors) that flow between them. This flexible architecture lets you deploy computation to one or more CPUs or GPUs in a desktop, server, or mobile device without rewriting code. 

TensorFlow - Artificial Intelligence Library from Google

Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files. Cobra is a library providing a simple interface to create powerful modern CLI interfaces similar to git & go tools.
 
It provides: 
<ul>
<li>Easy subcommand-based CLIs: <code>app server</code>, <code>app fetch</code>, etc.</li>
<li>Fully POSIX-compliant flags (including short &amp; long versions)</li>
<li>Nested subcommands</li>
<li>Global, local and cascading flags</li>
<li>Easy generation of applications &amp; commands with <code>cobra init appname</code> &amp; <code>cobra add cmdname</code></li>
<li>Intelligent suggestions (<code>app srver</code>... did you mean <code>app server</code>?)</li>
<li>Automatic help generation for commands and flags</li>
<li>Automatic help flag recognition of <code>-h</code>, <code>--help</code>, etc.</li>
<li>Automatically generated bash autocomplete for your application</li>
<li>Automatically generated man pages for your application</li>
<li>Command aliases so you can change things without breaking them</li>
<li>The flexibility to define your own help, usage, etc.</li>
<li>Optional tight integration with <a href="http://github.com/spf13/viper">viper</a> for 12-factor apps</li>
</ul>

Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files. Cobra is a library providing a simple interface to create powerful modern CLI interfaces similar to git & go tools.

Cobra - A Commander for modern Go CLI interactions

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

Hoodie is a generic backend with a client API for Offline First applications. It is an offline first, no backend architecture. Hoodie lets you build apps without thinking about the backend and makes sure that they work great independent from connectivity.

Hoodie - The Offline First Javascript Backend

Deployd is the simplest way to build realtime APIs for web and mobile apps. Ready-made, configurable Resources add common functionality to a Deployd backend, which can be further customized with JavaScript Events.
 
It includes Users Collection, user signup and authentication. It is also totally extensible, add custom properties and roles to your users, and write custom Event scripts to control access to users of your app.

Deployd is the simplest way to build realtime APIs for web and mobile apps. Ready-made, configurable Resources add common functionality to a Deployd backend, which can be further customized with JavaScript Events.

Deployd - A toolkit for building realtime APIs

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

Flow gives names to your Activity's UI states, navigates between them, and remembers where it's been. Navigate between UI states. Support the back button easily without confusing your users with surprising results. Remember the UI state, and its history, as you navigate and across configuration changes and process death. Manage resources with set-up/tear-down hooks invoked for each UI state. UI states can easily share resources, and they'll be disposed when no longer needed.

flow - Name UI states, navigate between them, remember where you've been.

xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. Written by the original inventor of NUnit v2, xUnit.net is the latest technology for unit testing C#, F#, VB.NET and other .NET languages. xUnit.net works with ReSharper, CodeRush, TestDriven.NET and Xamarin. It is part of the .NET Foundation, and operates under their code of conduct. 

xUnit - Unit testing tool for the .NET Framework

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