Slightly old news but...

Exomizer is a cross cruncher that targets 6502 based 8-bit computers, in particular the 8-bit home computers from Commodore.Some of the changes since the 2.0 beta 6 release:

• Fixed a bug in the 6502 forward decruncher regarding literal sequences longer than 255 bytes.
• Added z80 decruncher source code contributed by Metalbrain.
• Added experimental desfx sub-command to decrunch a sfx-generated file.
• Fix broken ROM/RAM banking NMI handling for the Atari target of the sfx sub-command.
• Improved the Oric 1 target of the sfx sub-command.
• A complete changelog is included in the zip file. For more info and download see the exomizer web site at http://hem.bredband.net/magli143/exo/.

Source: C64 Portal