If you find broken links, please tell me.
Docs from X.Org:
HTML X.Org Document Index
The following are copies from: https://tronche.com
The tarballs are the originals from Christophe Tronche. The HTML files
contain minor edits (see the respective grabber scripts) to make them
browsable through Gopher.
HTML ICCCM
BIN ICCCM Original Tarball
TEXT ICCCM Grabber Script
HTML XLib Manual
BIN XLib Manual Original Tarball
TEXT XLib Manual Grabber Script
HTML XLib Tutorial
BIN XLib Tutorial Original Tarball
TEXT XLib Tutorial Grabber Script