www.celtic-languages.org/Welsh/Getting_started - Some information and resources.
www.omniglot.com/writing/welsh.htm - Information, numbers, reources, audio, links, etc.
www.celtic-languages.org/Welsh/Resources - Welsh resources, courses, dictionaries, media, etc.
Say Something In Welsh - Audio course that starts at beginner level.
Duome - The grammar notes that were removed from the Duolingo course.
maes-e.com - Fforwm yn Gymraeg.
Geiriadur Prifysgol Cymru - Dictionary, including historical words and terms, and the etymology and history of words.
Gweiadur - Dictionary, thesaurus, place names, and verb conjugator.
Geiriadur yr Academi - Academic and historical dictionary.
Geiriadur Bangor - Dictionary.
Geiriadur UWTSD - Dictionary.
www.bbc.co.uk/cymru/cymraeg/safle/tafodiaith/tudalen/y_wenhwyseg.shtml - Gwybodaeth am dafodieithoedd Ynys Môn, gogledd-orllwein, gogledd-ddwyrain, de-orllewin, de-ddwyrain, Gwenhwyseg, y canolbarth, Rhosllannerchrugog, a "Stwnsh neu fwtrin?".
Valleys Welsh - Posts in and about Gwenhwyseg.
kimkat.org - dialects homepage, the Gwenhwyseg dialect, site map
Pocket Modern Welsh Dictionary, by King (2000)
Complete Welsh, by Brake and Jones (2000)
Gramadeg Cymraeg Cyfoes: Contemporary Welsh Grammar, (1998)
Colloquial Welsh: The Complete Course for Beginners, by King (1995)
Welsh in Three Months, by Brake and ap Myrddin (1994)
Teach Yourself Welsh, by Rhys Jones (1992)
A Welsh Grammar, by Williams (1980)
Teach Yourself Welsh, by Bowen and Rhys Jones (1960)
A Grammar of the Welsh Language, Based on the Most Approved Systems, with Copious Examples from Some of the Most Correct Welsh Writers, by Rowland (1853)
Welsh, in The Celtic Languages, Awbery (1993)
Some basic rules of Welsh grammar
Ap Geiriaduron
GPC - Geiriadur Prifysgol Cymru
SaySomethingIn