WEBruntime Public. .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps. C# 15,063 MIT 4,691 5,000+ (548 issues need help) 325 Updated 5 hours ago. android Public. .NET for Android provides open-source bindings of the Android SDK for use with .NET managed languages such as C#. C# 1,924 MIT 525 331 71 Updated 5 hours ago.