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

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

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

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

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

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