Reputedly an excellent set of resources for using libpng - but don’t take my word for it - my Japanese is non-existent.

http://www5.cds.ne.jp/~kato/png/

This web site is run by the author of MacLHA, a drag and drop version of LHA for Mac OS. You can also get access to a drag and drop LHA expander for Mac OS here.

http://hp.vector.co.jp/authors/VA008909/

A site that has a port of a drag and drop version of LHA to Mac OS X. My Japanese referrer tells me this version does not support MacBinary so resource forks will be lost by this program.

http://www.fan.gr.jp/~sakai/

A set of data compression links maintained by Haruhiko Okumura. Many of the links here point to Japanese language sites. Even if you cannot read Japanese, you may still profit from the profusion of links on this page. Just be sure your browser is set to render Shift-JIS.

http://www.matsusaka-u.ac.jp/~okumura/compression.html

I need a translation of this page from any interested volunteer.

http://www.matsusaka-u.ac.jp/~okumura/compression/

I need a translation of this page from any Japanese speaking volunteers.

http://www.matsusaka-u.ac.jp/~okumura/compression/cmaga.html

A Japanese language site that is somehow related to zlib.

http://www.matsusaka-u.ac.jp/~okumura/compression/zlib.html

Easy-GZ is a compression tool which allows extremely tight compression and quick decompression. Based on the GZip standard and optimized for the Macintosh platform, an easy-to-use, effective GZ compressor has finally been brought to the Mac OS. Is this software free or not? I’m putting it in the free category - if you find out otherwise please send me an email.

http://www.komkon.org/~stiles/easy-gz/index.html

Compact Pro is a shareware file compression and archival utility for the Mac. It compresses and stores files in “archives” which may span multiple diskettes. Compact Pro supports data encryption (US and Canadian users only) and self-extracting archives.

http://www.cyclos.com/compactpro.htm

An assortment of links on a wide variety of compression related topics. Includes a rating system indicating the value of the links.

http://www.eee.bham.ac.uk/woolleysi/book_web.htm

An audio compression format invented at NTT’s Cyber Space Laboratories. Get your player and compressor right here. (English avaible by following the sharp-eyed link.)

http://sound.splab.ecl.ntt.co.jp/

Some information on LZW, it looks as though this has info on Licensing, but I’m not sure. All information is in Japanese.

http://www.unisys.co.jp/LZW/

Home page for the Common Archivers Library project. This page is completely in Japanese, but an English version of the index is available at a single click. The goal of this project appears to be to provide standard library software that works with any and all archives. Good idea.

http://www.csdinc.co.jp/archiver/

An enormous page of data compression links, well organized by type. Although this page is hosted in Japan, nearly all of the links are described in English.

http://www.hn.is.uec.ac.jp/~arimura/compression_links.html

Home of LHMelt, UNLHA32.DLL, UNARJ32.DLL. All text on this page is in Japanese, except for a single link pointing to English information on UNLHA32.DLL.

http://www2.nsknet.or.jp/~micco/micindex.html

Mitsuharu Arimura’s page of links and references to a wide variety of papers and books on lossless compression. Some of the links are listed in English, others in Japanese.

http://www.hn.is.uec.ac.jp/~arimura/compression_papers.html

FTP site that contains LHA source code. Most of this page is in Japanese.

ftp://ftp.vector.co.jp/pack/dos/util/arc/lha/