A powerful, cross platform, SQL database system
Firebird RDBMS offers ANSI SQL features & runs on Linux, Windows & several Unix platforms. Features excellent concurrency & performance & powerful stored procedure & trigger language. WEBSITE link is below, TRACKER is http://tracker.firebirdsql.org
Desktop search application
DocFetcher is an Open Source desktop search application: It allows you to search the contents of files on your computer. — You can think of it as Google for your local files. The application runs on Windows, Linux and Mac OS X.
The Software Testing Automation Framework (STAF) is a framework designed to improve the level of reuse and automation in test cases and test environments. The goal of STAF is to provide a complete end-to-end automation solution for testers.
Windows Version of Linux Desktop Testing Project
Cross Platform GUI Test Automation tool Linux version is LDTP, Windows version is Cobra and Mac version is PyATOM. Linux GUI testing is known to work on GNOME / KDE (QT >= 4.8) / Java Swing / LibreOffice / Mozilla application on all major Linux distribution Windows GUI testing is known to work on application written in .NET / C++ / Java / QT on Windows XP SP3 / Vista SP2 / Windows 7 / Windows 8 Mac GUI testing is known to work on OS X Snow Leopard/Lion/Mountain Lion. Where ever ATOMac runs, LDTP should work on it The GNU/Linux Desktop (GUI Application) Testing Project (GNU LDTP) aimed at producing high quality test automation framework and cutting-edge tools that can be used to test and improve the GNU/Linux or Solaris desktops. It uses the Accessibility libraries to discover through the application's user interface. Supported OS GNU LDTP is a GNU/Linux / Unix GUI application testing tool. It runs on GNU/Linux, Windows, Mac, Solaris, FreeBSD, NetBSD and Embedded environment
ERP / BI / NFe
Mimicware is a high-level cross-platform, multimedia engine. It has been used in multiple commercial video game releases, and has been in active development at Funavision, Inc., since 2008. Mimicware is available under the Apache 2.0 license.
A collection of open source, easy to use web application generators. They are designed to simplify the process of building dynamic (mobile accessible, e-commerce) websites. They require no programming and are created by members of the project community.
Open Source Application Server Appliance based on Open Source GlassFish