[vindarel]

In the CL world: to embed CL in your C app: ECL; interface with the JVM: ABCL and LispWorks; for .NET: Bike (https://github.com/Lovesan/bike/). JS: JSCL and Valtan (might need more love).

[lispm]

CLASP in C and C++ via LLVM.

LispWorks and Allegro CL as shared libraries in various environments. LispWorks in iOS and Android Apps.

SBCL, I think, now possibly works also as a shared library.