Quip launches Live Apps, a collaboration development platform

Developer documentation is here: https://quip.com/dev/

The APIs to build Live Apps enable real-time coediting and online / offline syncing with no special code; you get a ton for "free," and we are super proud of the technology.

We open sourced all the apps we wrote, like Calendar, Kanban board, and more. Available at https://github.com/quip/quip-apps