Steam Backlog is a Steam library manager built with simplicity in mind. Managing your games and collections is easy, whether you have hundreds or thousands of games. Works in any modern browser.
The new cloud based service is hosted in https://steam-backlog.com
Steam Backlog was originally an Open Source Chrome extension. Continued work on the product lead to a lot of code on servers and finally migrated the service to a website without requiring the user to install any extension or use Google Chrome.
Now this repository serves as an issue tracker for the new cloud based service, and a new chrome-extension branch hosts the companion extension for the service.