Free powerful software for linux

ProScrabble is a scrabble playing program and a very powerful dictionary search. You can load/save/print games and add new dictionaries. It plays on 6 different levels and even the levels are editables.
Main features:
- Play against your friend, computer(s) or see a demo game between computers.
- Very powerful and fast dictionary search
- You can supply new dictionaries or edit them
- Save and load current game
- Replay the last game
- Hint from the computer
- And more

BioJava is an open-source project dedicated to providing a Java framework for processing biological data. It include objects for manipulating sequences, file parsers, DAS client and server suport, access to BioSQL and Ensembl databases, and powerful analysis and statistical routines including a dynamic programming toolkit.

Upgrade-oldest selectively upgrades a Debian system by upgrading the packages with the oldest and most significant version numbers. It can be limited to certain sections, and the level of version differece necessary to trigger an upgrade can be controlled.

It is a simple Python script, but it is very powerful.

pwbuilder is a powerful tool for creating software packages for Slackware Linux. pwbuilder aims to be the easiest tool in its category.

However, pwbuilder provides an advanced API that allows you to make packages exactly in the way you want.

ROX Filer is a fast and powerful graphical file manager.

It has full drag-and-drop support and background file operations, and is highly configurable.

TALK is a strictly and statically typed assembly language that is flexible and powerful enough to write operating system kernels.

For example, memory management (i.e. malloc/free) and multi-thread management can be implemented in TALK.

Simply Powerful ToolKit in short SPTK is a powerful widget toolkit based on the Fast and Light ToolKit (FLTK).
The goal of this library is to create the easy-to-use, compact and effective library of controls to extend the abilities of FLTK library.
It is geared for business-style application development with database support (ODBC). All the widgets support database connectivity. A special CDialog class makes editing database records very easy. Every widget can be connected to the field, and CDialog can be connected to the database table.
Most of the controls are database-bound. If you place them on the CDialog-derived window they can load and save information from/to database.
This is the first release version of my controls(widgets) library that was designed to work with FLTK. Im using it for about a year in the production project.
Enhancements:
- Fixed a bug in CField::asString() that cause returning an empty string for some non-empty fields.
- Added couple of small fixes for better error hanling in CRegistry.