Think of acts_as_tree + acts_as_list, but doing what you want: root categories, subcategories, positions, individual inherited permissions and some script.aculo.us view helpers.
Really simple database file storage for Rails 3
Coming soon, the best store locator ever
RoR Video Management
Concerto 2 Twitter Dynamic Content Magic, if it works.
Concerto Player for Chromium
The repository for high quality TypeScript type definitions.
CAS authentication support for Devise
Coming soon to an internet near you, a Ruby on Rails document management system.
Open Source Map Framework
golifx provides a simple Go interface to the LIFX LAN protocol
Java client library for Google Maps API Web Services
I/O 2012 Maps Engine CodeLab #2
Maps Engine Codelab #3
IO12 Maps Engine CodeLab 4
Some samples, utilities, and other pieces of map code I reuse often.
An up to date copy of Paperclip that stores files in the database.