Announcing Cheevos for Firefox - In-browser achievements as a way to learn more about the browser. Silly, but sometimes we need a little silly.
Laser - Static code-analysis tool for ruby. Looks interesting, though maybe not under active development.
Brakeman 1.1 Released - And while we're on the subject of code analysis, this tool has just been updated too.
A few links for those interested in following Firefox developments:
Features/Release Tracking - Major chunks of work that are headed for the next few releases, together with their status. Good place to go for an overview of big-ticket features.
Releases - Upcoming and past releases. If you can't remember what the version number is for Aurora vs. Nightly, this is the place to go.
The Burning Edge - Blog that tries to pick the notable fixes out of the Mozilla source code.
Just Enough Ruby - Introduction to the structure of ruby in a "top down" fashion, emphasizing its object-oriented structure, messaging, and modules right from the start.