A command line utility to pack and unpack zip archives using
multiple threads.

Supports
both zipping and unzipping
multithreading
uncompressed (i.e. stored) files
deflate and lzma compression and decompression
ZIP64 extensions (i.e. >4 GB files)
unix file attributes

Does not support
modifying existing archives
encryption (zip encryption is broken, use GPG instead)
ancient compression methods
archives split to multiple files