Small, portable SIP softphone for Windows.
Based on re/rem/baresip (https://github.com/baresip/).
Source code is using mostly BSD license (same as baresip).
Parts of the code might be using different but offering similar freedom (freedom to create closed source derivatives) licenses.
tSIP is built with Turbo C++ Exlorer 2006 (free version of BDS 2006, aka C++ Builder).