Android Cloud SDK & REST APIs to build apps for rendering & viewing images, HTML, PDF, Word, Excel, Email, Visio, Project & CAD file formats....DOCM, DOT, DOTX, DOTM Excel: XLS, XLSX, XLSM, XLSB, XLTX, XLTM...DOTM PPT RTF H VTX NUMBERS PDF XLS DGN VCF AS3 APNG POTM OXPS CXX...