DACT

DACT (Dynamic Adaptive Compression Tool) is a file compression utility, and associated compressed file format, developed primarily by Roy Keene.

It was originally named DCL, but was soon renamed to DACT.

Identification
At least for version 0.8.42, files start with signature bytes.

Specifications
There is some minimal format information in the Docs/file_format.txt file included with the source code.

Links

 * DACT website