Okay! It's here: http://quad.sourceforge.net/
The Linux version will be available later today. The AMD64 version, I hope, will be also available soon!
Looking back, I can say QUAD was EXTREMELY progressed during a short period of time - new Max compression mode in many cases has the same speed as with old Normal. And new Normal mode is just fantastic!
However, working on QUAD I got some idea to write a pure LZ77-coder - without PPM and other context-related stuff - to get the fastest decompression and high binary compression with tiny decompressor. To be continued...
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