Fityk

Preferred license: GNU General Public License (GPL)
Fityk is nonlinear curve-fitting and x-y data analysis software. It is written in C++. User interface uses wxWidgets library. Fityk community consists of one active developer and a number of contributors.
Actual source code produced by the student participants in Google Summer of Code™ for Fityk can be found here.
 
Current Projects
by Diaa Mahmoud Sami Abdel-Ghani, mentored by Marcin Wojdyr
by ZHANG Peng (张鹏), mentored by Marcin Wojdyr