BCX.RB is a full-fledged Ruby client that wraps the Basecamp Next API. Though not officially built by Basecamp's provider, 37Signals, BCX.RB is endorsed by Basecamp on their GitHub channel and developer site. Though it is usable, the wrapper is lacking endpoints and thus it's coverage of the Basecamp API is partially incomplete. Community contribution is encouraged. The following API resources are supported and have been tested using the wrapper: People, Projects, Todolists, Todos, Accesses, & Authorization.
Dropbox Paper, Dropbox's collaborative document product, now includes a document creation and editing endpoint within its API. Prior to the new endpoint, the Paper API was limited to document sharing and downloading. Now users can access Dropbox Paper's full functionality within 3rd party apps.
Bitrix24, an enterprise collaboration, project management and social network platform provider, has announced the launch of its Bitrix24 REST API, which provides developers programmatic access to the cloud version of the Bitrix24 platform.