It is a port from a previous C++ school project that I made at the University of Montréal as an exchange student.
You can find the C++ application here. It is less advanced than the web version, and I won't maintain it.
It features dynamic and adaptive topological tools, as well as more classical sculpting tools, such as drag, brush or smooth.
Right now, best performance are reached on Chrome.
On Firefox 22, the number of vertices is limited to 65536, on version 24 the limitation will be gone.