Eddress - An address system for the digital age

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

Locate - Locate allows you to easily find your friends and family from your iPhone, iPad, or iPod touch.

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, ...

Glintter - Add your favorite addresses and keep them within easy reach

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