Apfelstrudel, which explores Unicode normalisation and string operations; Dystextia for obfuscating Roman text using spoofing; and Rosettavert for converting between text encodings.
Dystextia
All these have now been updated and should pass Gatekeeper checks and run on both Sierra and High Sierra.
Tools for examining Unicode normalisation, converting between text encodings, and for obfuscating text using similar Unicode characters.
This new version has performance improvements, and can now encode almost every character in normal English text to an obscure Unicode codepoint. Total obfuscation!
There are lots of different ways to modify a string, but some would turn out to be very inefficient. A gentle wander through CharacterView and a mapping closure.
The Eclectic Light Company 