Matrex is a lightweight vectorial spreadsheet: calculates blocks of values, not single cells; it is strongly multithreaded; users can work together on sheets using a server. Adapters to matlab, scilab, octave, R.
The collection of MATLAB compatible routines for Mechanical Trading Systems. Released ta-lib - MATLAB MEX API to www.ta-lib.org . Related projects: http://sourceforge.net/projects/wlmllink and http://sourceforge.net/projects/algotrade.