Dynamic languages tools
I got a CD with Komodo Edit on it at XTech, but haven't tried it until now. The recent open-sourcing of the code, and then this post appeared on Planet Mozilla.
The user defined language tool is lexer + state machine based; I'd have preferred it to be a packrat based one, which I've played with before. But I don't want to have to write a whole IDE, I like using the Scintilla editor control, and Komodo's approach seems to get the job done.
As a side note, del.icio.us seems awfully slow these days. You'd have though that Yahoo would be able to give it a couple more servers. I wonder if the competitors are any better.