lz4 bindings for Haskell.

lz4 streaming library via ByteString

lz4-hs

Haskell bindings to lz4. Includes a bundled copy of lz4 1.9.3

Comparison

lz4-hs includes support for frames as well as blocks, unlike lz4 and lz4-conduit.

This means you can work with .lz4 files.