This C++ SDK is used for decoding Mapbox Vector Tiles. Vector tiles are the vector data equivalent of image tiles for web mapping that apply the strengths of tiling and were developed for caching, scaling and serving map imagery rapidly into vector data. Mapbox is an open source mapping platform for developers.
Getting on a plane and actually traveling somewhere is so old fashioned. Teleporting is the future. But since we haven't worked out all the kinks of physically moving our atoms from place to place, for now we have the Google Maps API and it's Street View feature.
One of the most important--and too often forgotten--pieces of a successful API is promoting what developers have built. Doing so should be a win-win, as both platform and developer should benefit from third-party apps being discovered by users. Location-sharing service FourSquare just re-vamped its application gallery and now any developer can be included.