
Addressable. Bob Aman’s better URI library for Ruby (via Sam Ruby)
Er.js. Erlang-style concurrency with JavaScript. (Mini-rant: I wish people would stop calling it Erlang-style, just give Erlang credit for popularizing and it’s rock-solid/super-fast implementation of message-passing processes) It does require new features from JavaScript 1.7, so only Firefox 2.0 for now.
Lock & load. Jonathan Snook’s file upload forms that don’t suck is a nifty JS library that adds a touch of user friendliness and slickness to your file upload forms.
Fundamental. With notable exceptions:
Trying stuff is cheaper than deciding whether to try it. (Compare the cost of paying and feeding someone to do a few weeks of [Perl or PHP] hacking to the full cost of the meetings that went into a big company decision.) Don’t overplan something. Just do it half-assed to start with, then throw more people at it to fix it if it works.
(Via Kottke)
Stick figures. In the beginning, there was the flowchart… is a funny rant about the obsessive need to obfuscate code by diagramming it. While stick figures were all the rage in prehistoric time, a surprising number of people insist on using them for software design. This rant is for them.
Not that all diagrams are bad, as illustrated by this flavor.

