SED, the Stream Editor Eric Pement's Cornerstone Mag site hosts an extensive FAQ, download sites for most operating systems, large list of handy one-liners, table of version differences, exhaustive links. http://www.cornerstonemag.com/sed/

GNU SED version 3.02.80 for OS/2 A port of the program for OS/2, requires RPM and EMX. http://www2s.biglobe.ne.jp/~vtgf3mpr/gnu/sed.htm

SED Tutorials Some items selected by Yiorgos Adamopoulos from the Seders grab bag and mailing list. http://www.dblab.ece.ntua.gr/~george/sed/

SED & AWK The most popular book on the stream editor, from O'Reilly. http://www.oreilly.com/catalog/sed2/noframes.html

Custom SED Proposal Wish list and manifesto for development of a new version of the editor. http://www.ptug.org/sed/custom_sed.html

SED FAQ (He Sed She Sed) Dreamwvr.com's alternate frequently asked questions list is arranged in increasing order of difficulty, and can be read as a tutorial. http://www.dreamwvr.com/sed-info/sed-faq.html

Roger Chang's SED and Shell Scripts SED and Bourne Shell scripts by a seder in Taiwan. http://main.rtfiber.com.tw/~changyj/sed/

Batch and Third-Party Programs Benny Pedersen gives examples of the use of SED in DOS batch files. http://users.cybercity.dk/~bse26236/batutil/help/SED.HTM

SED The Open Group "Single UNIX Specification" man page. http://www.opengroup.org/onlinepubs/7908799/xcu/sed.html

Shed Easy to use hex editor written for Unix/Linux using ncurses, with a friendly pico-style interface. http://shed.sourceforge.net/