Loci.me (still in beta) is a website for users to create and share locations of interest with other users. Places can be created from addresses, lat/long, or coordinates. Loci.me also provides an API for developers to create their own applications or interfaces for creating places. The API only provides a method for creating a new place using HTTP POST or GET parameters. While not strictly part of the API, users can also download place data in formats other than JSON/XML, such as KML or GPX (geoformats).
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.