For your convenience, below is a list of client libraries developed independently by third parties for Cloud Bigtable. Google is not affiliated with, and does not endorse, these client libraries.
The Bigtable-dotnet client library provides a native .NET client for Cloud Bigtable. The client library is written in C# and has been tested on Windows and Linux.
The Scio client library provides a Scala API for Google Cloud Dataflow, which can read from and write to Cloud Bigtable. The Scio repository provides sample code for a Cloud Dataflow pipeline that uses Cloud Bigtable.