Expressions - An app to play with regular expressions. Easily and nicely.
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
RegEx Lab - RegEx Lab allows you to test regular expressions.
Agent Ransack - Agent Ransack is a tool for finding files and information on your hard drive fast and efficiently.
Multi String Replacer - Replace multiple strings at once!
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.