WaveMaker - Open Source Database Creation Software

WaveMaker is a visual, drag and drop development platform for building web applications. WaveMaker generates standard Java applications that can run in any Java server. Applications created by WaveMaker can be extended using a standard Java IDE such as Eclipse.

Hotot - Micro-blogging desktop client

Hotot is a micro-blogging desktop client for Twitter as well as Identica, developed in Python as an open source application. Despite the fact that it is still in its early stages of development, as stated on the official website, it has succeeded to achieve the "Best Linux Twitter Client" in a poll published on WebUpd8.org

Gnac – Open Source Audio Convesion

Gnac (GNome Audio Converter) is an easy to use audio conversion program. It is designed to be easy and powerful. It provides easy audio files conversion between all GStreamer supported audio formats.

NMemory– An Open Source In-memory Computing Tool

NMemory is an open source In-Memory computing database. It can be hosted by .NET applications and supports traditional database features like indexes, foreign key relations, transaction handling and isolation, stored procedures, query optimization, field constraints.

Currently it just serves as the core component of the Effort library. However, developer interest and contribution could make it a more robust engine that might serve well in a wide range of scenarios.