ICE is a C++-library containing many tools for image analysis. It can be used on many systems and is widely platform independent. It runs under Linux/Unix as well as Windows. A C++-Compiler is required, that compiles C++11 programs. The framework wxWidgets is needed to visualize images on all platforms.
Writing ICE-programs is as simple as writing a C++ console program, there is no need for GUI specific programming knowledge.