What are some examples of GI Frameworks?

Gin: GI in No Time - a Simple Microframework for Genetic Improvement

“The goal of Gin is to stimulate development in GI tooling, and to lower the barrier to experimenting with GI and related ideas such as program fragility.

GrammaTech released extensive tooling for the programmatic modification and evaluation of software; focused on modifying C/C++ source, assembly, and ELF files: link; and C/C++ manipulation tooling: link.

Here are a few other examples of existing work:

Other frameworks and libraries identified at the Dagstuhl Seminar on Genetic Improvement of Software held in January 2018: