A short list on purpose. Each of these is something you would do to text just before or just after translating it.
Count words, characters and translation requests
Join text broken across lines
Strip diacritics from Latin text
UPPERCASE, lowercase, Title Case, Sentence case
Romanize Cyrillic, Greek, Arabic, Hebrew and Devanagari
You will not find a password generator or an email extractor here. They are useful, but they have nothing to do with translation, and a tool that does not belong on a site helps neither its visitors nor its search rankings.