This is an implementation of Rx text transformation script language.
A linguistic annotation store
Anti-Spam SMTP Proxy Server implements multiple spam filters
A vi-like editor based on Plan 9's structural regular expressions
Web-Based Bible Search Engine
Notepad for Windows, Linux, and Mac platforms
Extrect selected entries from LDIF files like grep
Executing shell commands via HTTP server
Simple, fast and yet powerful PHP router that is easy to integrate
HTTP router and URL matcher for building Go web servers
Access Log Profiler
wxMEdit, Cross-platform Text/Hex Editor, Improved Version of MadEdit
The fast scanner generator for Java™ with full Unicode support
Ada contributions : demos of GTKAda, binding to PCRE
ACHE is a web crawler for domain-specific search
Golang - Regular Expression Tutorial
Simple calculator for typing expressions with the keyboard
A high-performance sensitive word
An automatic check-in framework base on an HAR editor
Java regular expression debugger
Embeddable Javascript engine with a focus on portability
mgrep - A Multiline grep Implementation
Use Mongodb queries in JavaScript