Brain.inspect

A peek at the inner thoughts of Autonomous Machine.
February 2
A use case for Ruby's Enumerable#with_index, an often overlooked but useful method
January 31
(fab) - a pure javascript DSL for building async web apps
January 29
xaviershay's db2s3 adds handy rake tasks for backing up your database to S3

So easy, there is no excuse to not use it.
January 11
More than you want to know about JavaScript's delete

Totally worth a thorough reading.
December 11
memprof is a Ruby level memory profiler that doesn't patch the Ruby VM
November 20
S3fm is a web-based Amazon S3 File Manager
November 12
Despite it's snarkiness, this article contains some good JavaScript optimization tips
November 4
documentcloud's underscore provides much of the utility of Prototype's native object extensions, without extending native objects.
October 28
javan's whenever lets you define cron jobs in Ruby, and includes rake tasks to install these jobs into a user's crontab.
October 23
Rubular is a Ruby regular expression editor and tester