Luigi is a Python module that helps you build complex pipelines of batch jobs. It handles dependency resolution, workflow management, visualization etc. It also comes with Hadoop support built in.

A ubiquitous mini-profiler for Google App Engine, inspired by mvc-mini-profiler

A friendlier find(1).

aetycoon provides a library of useful App Engine datastore property classes.

Tools to analyze KA logs and other data

🚽 Colours and filters request logs from the Google App Engine dev server

🕵 Interactive mode for hg blame that traces when a particular line was introduced - not just when it was last edited

benchmarking for civ5 replays

⬜️ Split out whitespace changes from git commits