Use the identi.ca API to include Identi.ca either as an option in your programs or as the main platform for development. The Identi.ca API supports an API compatible with Twitter's, based on the open source project StatusNet. Identi.ca users can post small (140 chars or less) text notices and also subscribe to others' posts. Also, Identi.ca now supports a full feed of the public timeline via XMPP, which is likely most useful for data aggregators. Identi.ca is different from Twitter, Jaiku, Pownce, Plurk, and others because it is open, transparent, built on free software, and all the data is openly available via the Creative Commons Attribution license.
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.