packLZH is a universal file compression tool. It is based on packHUF and adds the well known LZ77 algorithm to the mix. Compression ratios highly depend on file content. In most cases, they should be a little worse than those reached by packARI, but at faster compression speeds and much faster decompression speeds.

Download it from here:
packLZH v0.5a (LGPL)
packLZH v0.4a (LGPL)

This has basically not been tested at all, so proceed at your own risk. You may freely use packLZH and it’s source code under the terms of the LGPL.