PostgreSQL is a robust relational database system with over 25 years of active development that runs on all major operating systems. It is fully ACID compliant, and has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). It includes most SQL92 and SQL99 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP. It also supports storage of binary large objects, including pictures, sounds, or video. It has native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, and ODBC, among others, and exceptional documentation.
sigue is composed of tools that allow users to track progress of students in one or more subjects and to generate reports periodically. It is tailored to Colombian schools, and includes an interface in PHP to facilitate the grading process (for teachers), and scripts to print reports for parents in LaTeX.
ProjectCoordinator is a Web-based collaborative workspace for project and workgroup management. It features effective information handling, and allows you to share a common document archive and quickly create a knowledge bank for the workgroup or project. It facilitates work according to a common project plan. It allows you to access the same meeting calendar and to share project news, developments, and results. The service can be used as an ASP-service, or a license can be acquired to run the software at the customer's preferred server location.
spectrwm is a minimalistic tiling window manager that tries to stay out of the way so that valuable screen real estate can be used for much more important stuff. It has sane defaults and does not require one to learn a language to do any configuration. It was written by hackers for hackers and it strives to be small, compact, and fast.
Quassel IRC is a modern, cross-platform, distributed IRC client, meaning that one or more clients can attach to and detach from a central core, much like the popular combination of screen and a text-based IRC client, but graphical. In addition to this unique feature, it aims to be a comfortable chatting program.