FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
Turnitin - Turnitin is preferred by educational institutions around the world for preventing plagiarism. Instructors at all levels of education can request that students use the service to submit papers, and Turnitin checks those papers for plagiarism.
Glyphs - Make everything from dingbat webfonts to full-fledged text typefaces in the most Mac-like font...
iThenticate - Prevent Plagiarism in Published Works
FontCreator - This professional font editor allows you to create and edit TrueType and OpenType fonts.
Urkund - Detect and check for plagiarism with URKUND