regular expressions 101 - Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.
HakuNeko - HakuNeko is an all-in-one cross-platform utility that supports you to download manga and anime with various website support.
.NET Regular Expression Designer - Learn, develop and test Regular Expressions for the .NET platform.
Hitomi Downloader - Desktop application to download images/videos/music/text from Hitomi.la and other sites, and more.
RegexMagic - Use RegexMagic to generate complete regular expressions to your specifications by using RegexMagic's flexible patterns, instead of the cryptic regex syntax.
HDoujin Downloader - A powerful doujin/manga downloader that supports hundreds of different websites.