» Aenigmata
The early Medieval riddle collections by Symphosius and Aldhelm (in Latin), with an introduction.
http://personal.bgsu.edu/~jmpfund/Aenigmata.html
» Grecian Riddle-Jokes
Article by Evangelos Gr.Avdikos on riddle-jokes, which use word patching for parodying social situations.
http://haldjas.folklore.ee/folklore/vol10/minorf.htm
» Homefun on Riddles
A guide to general questions about riddles, their significances, and forms.
http://www.siskiyous.edu/class/engl12/RIDDLES.htm
» Old English Riddles
Paper by Hazel Brewer on the history of Old English riddles.
http://www.chass.utoronto.ca/~cpercy/courses/1001Brewer.htm
» Sexual Riddles: The Test of The Listener
Article by Annikki Kaivola-Bregenhøj discussing the history and context of sexual riddles.
http://cc.joensuu.fi/~loristi/1_97/kai197.html
» Sirandanes - Riddles
Riddles of Mauritia in Mauritian Creole, French and English.
http://www.kreol.mu/Sirandanes_1.htm
» Syllabus for Puzzling Narratives
Online course materials exploring the function of charms and riddles in traditional and modern literature.
http://www.eiu.edu/~multilit/english4390-f00/syllabus.htm
» The Morrison Collection - Dengmi Yadiao
Collection of 67 Chinese lantern riddles (in Chinese) with introduction, from a collection of Chinese books at SOAS.
http://uk.geocities.com/Morrison1782/Texts/DengmiYadiao.html
» Versification of Vietnamese Riddles
Discussion by Cong-Huyen-Ton-Nu Nha-Trang on stylistic features as a means to distinguish the riddle from other genres of folk poetry.
http://www.geocities.com/chtn_nhatrang/riddles.html
» Yahoo! Groups: ClassicRiddles
Forum keeping the classic rhyming riddles alive.
http://groups.yahoo.com/group/ClassicRiddles/