DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, and a unit testing tool.

DrJava - Lightweight development environment for writing Java programs

Clappr is an extensible media player for the web. 

Clappr - An extensible media player for the web

Transport Layer Security (TLS) is a cryptographic protocol designed to provide communication security over the Internet. This is an open source Python implementation of TLS 1.2, using the Python Cryptographic Authority's (PyCA's) Cryptography libraries for all cryptographic primitives (e.g. AES, RSA, etc.). This project is part of PyCA's efforts to standardize and improve crypto libraries in Python.

TLS - Transport Layer Security protocol implementation in Python

Dart is an open-source, scalable programming language, with robust libraries and runtimes, for building web, server, and mobile apps.

Dart - Scalable Programming Language

Sentinel is a PHP 5.4+ fully-featured authentication & authorization system. It also provides additional features such as user roles and additional security features. Sentinel is a framework agnostic set of interfaces with default implementations, though you can substitute any implementations you see fit. <BR>
Its fetures include:
<ul>
<li>Authentication.</li>
<li>Authorization.</li>
<li>Registration.</li>
<li>Users &amp; Roles Management.</li>
<li>Driver based permission system.</li>
<li>Flexible activation scenarios.</li>
<li>Reminders (password reset).</li>
<li>Inter-account throttling with DDoS protection.</li>
<li>Custom hashing strategies.</li>
<li>Multiple sessions.</li>
<li>Multiple login columns.</li>
<li>Integration with Laravel.</li>
<li>Allow use of multiple ORM implementations.</li>
<li>Native facade for easy usage outside Laravel.</li>
<li>Interface driven (your own implementations at will).</li>
</ul>

Sentinel is a PHP 5.4+ fully-featured authentication & authorization system. It also provides additional features such as user roles and additional security features. Sentinel is a framework agnostic set of interfaces with default implementations, though you can substitute any implementations you see fit.

Sentinel - A framework agnostic authentication & authorization system.


Bistro is a toolkit for making services that schedule and execute tasks. Bistro is a toolkit for making distributed computation systems. It can schedule and run distributed tasks, including data-parallel jobs. It enforces resource constraints for worker hosts and data-access bottlenecks. It supports remote worker pools, low-latency batch scheduling, dynamic shards, and a variety of other possibilities. It has command-line and web UIs.

Bistro - Flexible distributed scheduler, a high-performance framework supporting multiple paradigms while retaining ease of configuration, management, and monitoring

A screamingly fast, ultra-lightweight WSGI server for CPython, written in C using Marc Lehmann's high performance libev event loop and Ryan Dahl's http-parser. It is single threaded and it has less memory foot print.

bjoern - Fast And Ultra-Lightweight HTTP/1.1 WSGI Server

RockMongo, a MongoDB administration tool, written in PHP5, is Best in PHP world, more like PHPMyAdmin. 

RockMongo - MongoDB Administration Tool in PHP

SQLCipher is an open source extension to SQLite that provides transparent 256-bit AES encryption of database files.

Sqlcipher - SQLite extension that provides 256 bit AES encryption of database files

 In the fall of 2015, we published the paper “Gorilla: A Fast, Scalable, In-Memory Time Series Database” at VLDB 2015. Beringei is the open source representation of the ideas presented in this paper. Beringei is a high performance time series storage engine. Time series are commonly used as a representation of statistics, gauges, and counters for monitoring performance and health of a system.

Beringei - High performance, in-memory storage engine for time series data.

Ldap Synchronization Connector reads from any data source including databases, LDAP directories or files and transforms and compares this data to an LDAP directory. These connectors can then be used to continuously synchronize a data source to a directory, for a one shot import or just to compare differences by outputting CSV or LDIF format reports. 
<BR><BR>
LSC offers a powerful transformation engine, based on a scripting language, to easily manipulate data on the fly.

Ldap Synchronization Connector reads from any data source including databases, LDAP directories or files and transforms and compares this data to an LDAP directory. These connectors can then be used to continuously synchronize a data source to a directory, for a one shot import or just to compare differences by outputting CSV or LDIF format reports.

LSC engine - LDAP Synchronization Connector

Snarl is a notification system for Windows, inspired by Growl for Mac. It includes a number of advanced features including configurable styles and extensions, presence management and support for numerous protocols, including the emerging GNTP. It helps to stay up to date with news feeds, emails, sports and weather updates and more. See notifications on your desktop and mobile devices. 

Snarl - A notification engine for Windows

JLine is a Java library for handling console input. It is similar in functionality to BSD editline and GNU readline but with additional features that bring it in par with ZSH line editor. 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.

Jline3 - Java library for handling console input

The Spread toolkit provides a high performance messaging service that is resilient to faults across local and wide area networks. Spread functions as a unified message bus for distributed applications, and provides highly tuned application-level multicast, group communication, and point to point support. Spread services range from reliable messaging to fully ordered messages with virtual synchrony delivery guarantees.

Spread toolkit - High performance messaging service that is resilient to faults across local and wide area networks

PaxosStore is a distributed-database initially inspired by Google MegaStore. It's the second generation of storage system developed to support current WeChat sevice and applications. PaxosStore has been deployed in WeChat production for more than four years, providing storage services for the core businesses of WeChat backend including user account management, user relationship management (i.e., contacts), instant messaging, social networking (i.e., Moments), and online payment (i.e., WeChat Pay).

 PaxosStore - Distributed Database initially inspired by Google MegaStore

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