From their site: Extends the idea of social tagging systems like del.icio.us, Flickr or BibSonomy by introducing the group dimension. The foundation of social tagging systems are folksonomies. A folksonomy is just a collection of tag assignments. Over time it is likely that semantics emerge--tags that are often assigned to the same resources may be synonyms. With GroupMe's approach of taggable groups we extend tag assignments with a group dimension.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.
The GroupMe Node.js SDK by Niels Joubert communicates with the API to access group messaging features. Resources include a getting started guide to receive token, API interaction, and GET and POST data from the interface.