WhirlyGlobe-Maply is a geospatial display SDK for iPhone, iPad, and Android devices. We're proud to offer this amazing globe and map toolkit as open source.
You'll find WhirlyGlobe-Maply in a wide variety of apps, from weather to map to civil aviation. It's big and functional, but friendly, with a nice selection of tutorials and a comfortable native API on each platform.
WhirlyGlobe-Maply is open source, but we do offer a support contract. It's a simpler deal than paying us by the hour and the contract is 50% less likely to annoy your lawyer.
The iOS support contract is $950 (USD) and the Android version is $1200 (USD) per year. You get quick response to your questions, bug fixes and work arounds and input on the feature roadmap. Contact us for details.