gcin is a GTK+ based input method which focused mainly on Traditional Chinese. However, it is also very useful for Simplified Chinese, Japanese, and many other languages.

Planets is a simple interactive program for playing with simulations of planetary systems. It is great for teaching gravitation on planet level.

wxMaxima is a graphical user interface for the computer algebra system Maxima. It eases the use of Maxima by making most of its commands available through a menu system and by providing input dialogs for commands that require more than one argument. It also implements its own display engine that outputs mathematical symbols directly instead of depicting them with ASCII characters.

Gip provides system administrators with tools for IP address based calculations. For example, an administrator who needs to find out which IP prefix length equals the IP netmask 255.255.240.0, just types in the mask and gets the prefix length presented. But many more advanced calculations can be made. Gip can convert an address range into a list of prefix lengths. It can also split subnets using a given IP netmask or IP prefix length. Many more calculations are possible.

Squeak is a full-featured implementation of the Smalltalk programming language and environment based on (and largely compatible with) the original Smalltalk-80 system.

Blogilo is a Free/Open Source Blogging client, focused on simplicity and usability. Currently featured: