Comparison to Other Tool Kits
Another very efficient graphics toolkit is the Fast Lightweight Tool Kit (FLTK).
Otk's featured HelloWorld.c program matches the FLTK
hello.cxx example in functionality and appearance.
However, the size of the Otk executable (when statically linked on i86 Linux) is 56-kB, vs 97-kB for the
FLTK hello.cxx program. Similarly, Otk's HelloWorld.c program has five lines of text, while FLTK's
hello.cxx program has about a dozen lines. This complexity ratio may remain for larger programs as well.