Egof
To retrieve obscure syntax of languages, or bookmark code comments.
Facilitates retrieval of personalized comments previously put into code. While writing new, (or reviewing old) code, user adds search-tag (the string "EGOF") to comments. Subsequently running Egof (followed by optional search words) retrieves them.
Code can be in any programming language, or scripts used by applications, or HTML or LaTex files.
Sounds like a combination of Unix find/grep, but has many more features. Searching is faster since database files are created, one per language...