Simple, efficient background processing for Ruby. Sidekiq uses threads to handle many jobs at the same time in the same process. It does not require Rails but will integrate tightly with Rails 3/4 to make background processing dead simple. Sidekiq uses multithreading so it is much more memory efficient than Resque (which forks a new process for every job). 

Sidekiq - Simple, efficient background processing for Ruby

Odoo (formerly OpenERP) is a suite of web based open source business apps. The main Odoo Apps include an Open Source CRM, Website Builder, eCommerce, Project Management, Billing & Accounting, Point of Sale, Human Resources, Marketing, Manufacturing, Purchase Management


Odoo - Open Source Apps To Grow Your Business

JobRunr is the ultimate library to perform background processing on the JVM. It performs fire-and-forget, delayed, scheduled and recurring jobs inside Java applications using only Java 8 lambda's. CPU and I/O intensive, long-running and short-running jobs are supported.
It can be used in various use cases like batch processing, image processing, database maintenance, daily maintenance like taking backups, sending out notifications etc. 
Its feature include:
<ul>
<li>Simple: just use Java 8 lambda's to create a background job.</li>
<li>Distributed &amp; cluster-friendly: guarantees execution by single scheduler instance using optimistic locking.</li>
<li>Persistent jobs: using either a RDMBS (four tables and a view) or a noSQL data store.</li>
<li>Embeddable: built to be embedded in existing applications.</li>
</ul>

JobRunr is the ultimate library for background processing in Java.

JobRunr - The ultimate library for background processing in Java.

BoneCP is a fast, Java database connection pool (JDBC Pool) library. Its feature include:
 <UL>
	<LI>Highly scalable, fast connection pool</LI>
	<LI>Callback (hook interceptor) mechanisms on a change of connection state</LI>
	<LI>Statement caching support</LI>
	<LI>Automatic resizing of pool</LI>
	<LI>Support for obtaining a connection asynchronously</LI>
	<LI>Easy mechanism to execute a custom statement on each newly obtained connection</LI>
	<LI>Support to switch to a new database at runtime without shutting down an application</LI>
	<LI>JMX support </LI>
	<LI>Ability to replay any failed transaction automatically </LI>
	<LI>Datasource/Hibernate support capable</LI>
	<LI>Debugging support and Hooks available</LI>
 </UL>

BoneCP is a fast, Java database connection pool (JDBC Pool) library.

BoneCP - The JDBC Connection Pool

web2py is a full-stack framework for rapid development of fast, scalable, secure and portable database-driven web-based applications. This framework is based on Model-View-Controller design and it has support to Server-side form validation and postbacks. It has the ability to generate forms from database tables and it includes an extensive set of validators. It is easy to install and configure. The package includes Python interpreter, web-server, relational database. Its admin interface is easy to configure and helps to create a new application, upload a packed application, maintain and download them. It has support for SSL and streaming-capable web server, a relational database, a web-based integrated development environment and web-based management interface, a Database Abstraction Layer that writes SQL for you in real time, internationalization support, multiple authentication methods, role based access control, an error logging and ticketing system, multiple caching methods for scalability, the jQuery library for AJAX and effects.

web2py is a full-stack framework for rapid development of fast, scalable, secure and portable database-driven web-based applications. This framework is based on Model-View-Controller design and it has support to Server-side form validation and postbacks. It has the ability to generate forms from database tables and it includes an extensive set of validators.

web2py - Python Web Framework

Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third party interference. These apps run on a custom built blockchain, an enormously powerful shared global infrastructure that can move value around and represent the ownership of property. 
 
This enables developers to create markets, store registries of debts or promises, move funds in accordance with instructions given long in the past (like a will or a futures contract) and many other things that have not been invented yet, all without a middle man or counterparty risk.
 
It allows you to hold and secure ether and other crypto-assets built on Ethereum, as well as write, deploy and use smart contracts. It helps you to design your own currency.

Ethereum is a  decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third party interference. These apps run on a custom built  blockchain, an enormously powerful shared global infrastructure that can move value around and represent the ownership of property. 

Ethereum - Blockchain APP Platform

Gluster is a software defined distributed storage that can scale to several petabytes. It provides interfaces for object, block and file storage. It is a distributed scale-out filesystem that allows rapid provisioning of additional storage based on your storage consumption needs. It incorporates automatic failover as a primary feature. 
 
Gluster runs on top of most unix filesystems, with XFS and ext4 being the most popular choices. Data can be accessed from just about anywhere – You can use traditional NFS, SMB/CIFS for Windows clients, or our own native GlusterFS (a few additional packages are needed on the client machines for this, but as you will see, they are quite small).

Gluster is a software defined distributed storage that can scale to several petabytes. It provides interfaces for object, block and file storage. It is a distributed scale-out filesystem that allows rapid provisioning of additional storage based on your storage consumption needs. It incorporates automatic failover as a primary feature. 

Gluster Filesystem - Scalable Network Filesystem

OpenPGP.js is a JavaScript implementation of the OpenPGP protocol. It aims to provide an Open Source OpenPGP library in JavaScript so it can be used on virtually every device. This does not require gpg on their machines in order to use the library. The idea is to implement all the needed OpenPGP functionality in a JavaScript library that can be reused in other projects that provide browser extensions or server applications. It should allow you to sign, encrypt, decrypt, and verify any kind of text - in particular e-mails - as well as managing keys. 

OpenPGP.js - OpenPGP implementation for JavaScript

Alloy Editor is a modern WYSIWYG editor built on top of CKEditor, designed to create modern and gorgeous web content. It provides smart toolbars appear right near the selected text and offer different functionality based on context, Paste rich text from any web page and preserve its formatting, The full styling power of CKEditor and lot more.

Alloy Editor - WYSIWYG editor based on CKEditor with completely rewritten UI

PDFClown is a PDF library helps to generate, read and edit PDF. It helps to split and merge the PDF documents. It has support to add Images, Fonts, Barcodes, Bookmarks, Annotations, Form fields like check box, button, list box etc, Compression, text extraction. It has .NET version developed for mono. 
 
 Source forge: <A HREF="http://sourceforge.net/projects/clown/" target="_blank">http://sourceforge.net/projects/clown/</A>

PDFClown is a PDF library helps to generate, read and edit PDF. It helps to split and merge the PDF documents. It has support to add Images, Fonts, Barcodes, Bookmarks, Annotations, Form fields like checkbox, button, list box etc, Compression, text extraction.

PDFClown - PDF library

Constellio Open Source Enterprise Search is based on Apache Solr and using Google Search Appliances connectors architecture, it allows, with a single click, to find all relevant content in your organization (Web, email, ECM, CRM etc.). 

 It supports Federated search, Using the single interface data in the organization could be discovered or searched. It provides multi-lingual search. Support for more than 15 languages are available. It has support of automatic document classification, adding tags or keywords to the documents. Additional to that this product has all kind of feature a Enterprise Search engine should have. It supports reporting on indexing and search, Sort results, Synonyms search, Thesaurus support, Auto complete, Facet etc. Constellio can index SharePoint sites, Documentum, FileNet, LiveLink. 

 Google's Enterprise Connector Manager provides support to retrieve data from different sources like database, file system, CRM, Email etc. Data from database could be retrieved using <A HREF="http://code.google.com/p/google-enterprise-connector-database/" target="_blank">Database connector</A>. This product most efficiently using this and retrieves the data from different sources. It uses Apache Solr to index the content. 

 Constellio's secure web interface will allow you to search your email and access attached files. It also provides API support in Ruby, PHP, Java, Python, JSon, C#, ColdFusion. Google's Enterprise Connector used in Google Search Appliance is constantly adding more connectors to retrieve data from different sources. Since Constellio uses this more Enterprise search support will be provided.

Constellio Open Source Enterprise Search is based on Apache Solr and using Google Search Appliances connectors architecture, it allows, with a single click, to find all relevant content in your organization (Web, email, ECM, CRM etc.).

Constellio - Enterprise Search engine

Psycopg is the most popular PostgreSQL database adapter for the Python programming language. Its main features are the complete implementation of the Python DB API 2.0 specification and the thread safety (several threads can share the same connection). It was designed for heavily multi-threaded applications that create and destroy lots of cursors and make a large number of concurrent "INSERT"s or "UPDATE"s.

Psycopg - Python PostgreSQL Database Adapter

Dqlite is a fast, embedded, persistent SQL database with Raft consensus that is perfect for fault-tolerant IoT and Edge devices. Dqlite (“distributed SQLite”) extends SQLite across a cluster of machines, with automatic failover and high-availability to keep your application running. It uses C-Raft, an optimised Raft implementation in C, to gain high-performance transactional consensus and fault tolerance while preserving SQlite’s outstanding efficiency and tiny footprint.

Dqlite - High-availability SQLite

SMSsync is a simple, yet powerful SMS to HTTP sync utility that turns any Android phone into a local SMS gateway by sending incoming messages(SMS) to a configured URL (web service). 

SMSSync - SMS gateway for Android powered phones

Lightspark is a modern, open source, flash player implementation written from scratch following the SWF file format specifications released by Adobe. Lightspark main target is supporting newer Flash versions (9/10) and ActionScript 3.0 while being efficient leveraging the capabilities of modern hardware such as heavy parallel processing and programmable video cards.

Lightspark - modern flash player implementation

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