There are 2 repositories under delta-compression topic.
a C\C++ library and command-line tools for Diff & Patch between binary files or directories(folder); cross-platform; runs fast; create small delta/differential; support large files and limit memory requires when diff & patch.
Facilitates Client Server communication through Events. Has Encode, Decode, Diff, Patch and Message Knowledge
Fossil delta compression algorithm for python.
Delta compression over HTTP with extended support for GraphQL
Delta encoding for your FlatSharp objects.
remote delta-compression library
Double-Delta Time Series compressor (prototype)
An implementation of a byte-level snapshot delta algorithm (inspired by the Quake 3 network code) on top of KryoNet