My English blog mostly contains tools I built, or scripts I wrote / adapted for my own use. It's useful for me, and hopefully useful for you as well.
Regex: filter links from HTML (UpdateWith this neat little regex.
Extract first sentence (UpdateEither with PHP or a regex. For example, use it to prefill a meta-description field.
Remove double trailing slashes (Update
Aspect ratio calculator (UpdateAn easy to use free tool to help you with resizing images and videos, while maintaining the way they look: their aspect ratio. Simple and effective.
MySQL fetch Nth segment of URL (UpdateHow to segment the path of a URL into its parts. A simple MySQL function to aid you when doing website analysis.