grep - grep is a command-line utility for searching plain-text data sets for lines matching a regular...

KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.

PowerGREP - Quickly search through large numbers of files on your PC or network using powerful text patterns to find exactly the information you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...

CheatKeys - View Windows keyboard shortcuts in the current application.

dnGREP - dnGrep allows you to search across files with easy-to-read results.

cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.