Some Commercial, MatLab Alike, Mathematics and Statistics, Signal and Image Processing, Finite or Boundary Element, Numerical Analysis, CAD, Graph and Visulization, Plotting, Word Processing or Typesetting, X-Window GUI Builder, Misc and Others...
While Postgres95 retains the powerful data model and rich data types of POSTGRES, it replaces PostQuel with an extended subset of the intergalactic dataspeak, SQL. It is free and the complete source is available.
LyX combines the comfortable usage of a WYSIWYG-wordprocessor with the high quality of LaTeX. LyX is easier to use than a losedows-wordprocessor and produces a *MUCH* nicer output. You can edit much larger texts on a small PC than with commercial WPs under another well known Operating Systems.
A structure editor that acts as a quasi-WYSIWYG interface to ascii mark-up languages. It is particularly oriented to the creation of (La)TeX documents but can also be used for writing html, troff or whatever.
Python is an interpreted object-oriented programming language, and is often compared to Tcl, Perl or Scheme. It can function as a scripting/extension language, as a rapid prototyping language, and as a serious software development language.
Executive Tools' port of the Common Desktop Environment (CDE) for Linux. CDE is a graphical user interface and application toolbox that is or will soon be provided by major UNIX system vendors, including DEC, IBM, HP, Sun and others.