Resources to help you expand your Welsh

DuoWelsh
If you've been learning with Duolingo, and haven't seen DuoWelsh, then you are having half the experience!
DuoWelsh includes all the original lesson notes, listening practices and weekly chat sessions, sutiable for all levels.

Doctor Cymraeg
Wherever there are Welsh learners, you will find the Doctor Cymraeg, and that includes here at Cyd-Siarad.
With courses, books and other resources, take a visit to the Doctor here:

We Learn Welsh
Created by Heather Broster, who learnt Welsh as an adult.
Features a really interesting blog and a detailed look at one 'word of the day' five days a week - click here to visit the site.
It's well worth looking at We Learn Welsh on Facebook as well for even more goodies, in the form of word sheets around different topics

Ymestyn
Produced by Suw Charman-Anderson, of Clwb Malu Cachu fame, this site leads you through different practises to expand your grammar and vocabulary.

Welsh Song Lyrics Wiki
One great way to learn new vocabulary is by listening to songs. And here are lyrics and translations for a growing collection of YouTube based Welsh songs.
So now, you can sing your favourite songs, and understand the words you're singing.