AdvanceCOMP v1.16 is released. AdvanceCOMP contains recompression utilities for your .zip archives, .png images, .mng video clips and .gz files.

AdvanceCOMP package contains:
advzip - Recompression and test utility for zip files
advpng - Recompression utility for png files
advmng - Recompression utility for mng files
advdef - Recompression utility for deflate streams in .png, .mng and .gz files

AdvanceCOMP v1.16 Changelog:
* Allowed recompression with files with zero length.
* Some other minor bugfixes.
* Now in git repository.

Download: AdvanceCOMP v1.16
Source: Here