Geiriadur.net Gorau!

Geiriadur Prifysgol Llanbedr Pont Steffan - Online dictionary from the University of Lampeter. You can select the interface in either welsh or english, which is definately an advantage if your welsh isn't fluent enough.

Geiriadur.ru newydd!

Geiriadur i drosi o'r Gymraeg i Rwseg.

Dictionary for translating between Welsh and Russian.

Gerlyver Kernewek - Kembrek newydd!

Geiriadur Cernyweg i Gymraeg.

Cornish to Welsh dictionary.

Klebran.org.uk

I helpu'ch gramadeg cymraeg.

Online welsh grammar checker.

Geiriadur Cymraeg ar y BBC - BBC's Welsh Dictionary -

Geiriadur a llawer o adnoddau eraill i'r rhai ohonoch sy'n ceisio dysgu neu gloywi'ch iaith. As well as an english-welsh dictionary, there are other resources for those of you looking to learn or improve your welsh.

Cronfa Genedlaethol o dermau gan Bwrdd yr Iaith - National database of terms from the Welsh Language Board.

Mae'r safle yma yn cynnig eirfa arbenigol; o wyddoniaeth i fynydda.

This site offers a much more specialised terms; from science to mountaineering.

Language Identifier - XEROX -

Tipyn o hwyl i weld os ydi'r safle yma'n adnabod eich geriau fel y gymraeg. Bit of fun here, see if this site recognises what you type in as welsh.

Online Language Translator -

Cynnig i chwi gyfieithu safleoedd gwe i'r/o'r gymraeg. Lets you translate website to/from welsh.

Dysgu Cymraeg gyda Acen - Learn Welsh with Acen.

Llawer o adnoddau werthfawr ar y safle yma i'r pobl sydd eisiau dysgu cymraeg.

Plenty of valuable resources on this site for those who want to learn welsh.