zpaq v1.01, Updates reference decoder comments and help message and fixes some VS2005 compiler issues. Compatible with 1.00. Apr. 27, 2009.
zpaq v1.02, Closes extracted files immediately after decompression instead of when program exits. Fixes g++ 4.4 warnings. Compatible with 1.00 and 1.01. June 14, 2009.
zpaq v1.03, Has a default compression mode (mid.cfg), supports compressing files in segments to separate blocks and extracting them as suggested in part 7 of the spec. Does not store paths by default. Does not extract to absolute paths by default. Some minor improvements. Sept. 7, 2009 (added zpaq.exe Sept. 8, 2009).
zpaq103b adds zpaqsfx 1.03, a stub for creating self extracting archives. No changes to zpaq or unzpaq. Sept. 14, 2009.
zpaq v1.04, Can list and extract from self extracting archives without running them. Added progress meter. zpaqsfx.exe stub is slightly smaller. unzpaq unchanged. Sept. 18, 2009.
zpaq v1.05, Removes built in x and p preprocessors and makes them separate programs called from config files with compile time postprocessor testing. Adds if-else-endif and do-while to ZPAQL. Many small changes. Sept. 28, 2009.
zpaq v1.06, adds "ta" to append locater tags to allow ZPAQ streams to be detected when embedded in arbitrary data. Sept. 29, 2009.
zpaqsfx 1.06 self extracting archive stub is now separate from the ZPAQ distribution. Updated Sept. 29, 2009, posted Oct. 26, 2009. (Replaced by zpsfx in libzpaq 2.01)
zpaq v1.07, adds config file parameters and fixes some bugs. From now on the specification and reference decoder are not included unless they change. Oct. 2, 2009.
zpaq v1.08, generates optimized code that runs about twice as fast on systems with a C++ compiler installed. Oct. 14, 2009.
unzpaq108.cpp removes undefined behavior of ZPAQL shifts larger than 31 bits on non x86 hardware. Oct. 14, 2009.
zpaq v1.09, Linux port and some cosmetic bug fixes. Oct. 21, 2009.
zpaq v1.10, bug fix for Linux/g++ 4.4.1, Dec. 28, 2009.
zpipe v1.00, a simple streaming compressor, Sept. 30, 2009. Linux patch added Jan. 18, 2010.
zp v1.00 simple ZPAQ compatible archiver with 3 optimized compression levels, Apr. 26, 2010.
libzpaq 0.01, Sept. 27, 2010.
libzpaq 0.02, Sept. 28, 2010.
zpipe 2.00 updated to use libzpaq 0.02, Sept. 28, 2010.
libzpaq 1.00, Sept. 29, 2010. Package includes libzpaq, ZPAQ specification, reference decoder, zp, zpipe, and fast, mid, max config files.
libzpaq 1.01, Oct. 14, 2010. Updates libzpaq interface to use inheritance instead of templates, requiring changes to zp and zpipe. Now compiles faster.