The program implements a demo application which demonstrates using C++ stream-compatible sockets developed by Maciej Sobczak http://www.msobczak.com/
ChemVisio is software which might be useful for educational purposes (non-organic chemistry, crystallography etc.). It might be a good visualization support for all people who need better illustrations than that you could see in books.
Fast and simple calculator.
Fast calculator is fast and simple calculator with many functions on java.
computational renormalization group
YoSpin is a computational renormalization group.