LearnGaelic.net - This site has great short and easy to complete lessons for wanna be Gàidhlig speakers of all levels. (I’m currently on Beginner Lesson 5 and can now actually describe our miserable winter weather in Gàidhlig!)
Facebook group dedicated to keeping English idiom out of Gàidhlig. Àdhamh contributes things to this page occasionally and recommends it as verra useful!
am baile Highland History and Culture web site