Microsoft has published their “Simple Encryoted Arithmetic Library” SEAL. The code is written in standard c++ without external dependencies.
Microsoft has lead international efforts to standardize homomorphic encryption. Standardization and a larger base of developers actually working on this new paradigm of provacy-preserving computation are key to turn homomorphic encryption from an experimental, academic research into applications that can practically be implemented for real use cases.
Read Microsofts anouncement here:
The SEAL repo on Gitub: