Bizesize Higher Gaelic -
Revision materials for the Gaelic Highers: Reading, Listening, Literature, Writing, Speaking, Grammar.
Bizesize Higher Gàidhlig - Ath-sgrùdadh airson na Highers: Leughadh, Sgrìobhadh, Èisteachd, Litreachas.
Colin Mark's Dictionary @ Google Books - Faodar làrach Google Books a chleachdadh gus lorg anns an fhaclair an dà chuid bho Ghàidhlig gu Beurla is bho Bheurla gu Gàidhlig. Cha seallar na h-uile duilleag, ach ma bhios am faclair seo agad is urrainn dhut àireamh na duilleige a chleachdadh gus coimhead air an leth-bhreac a th' agad nuair a bhios tu a' lorg faclan na Beurla. -
You can use Google Book's search function to search the dictionary in both directions. Not all pages are available for display, but if you own the dictionary you can use the page number to check in your copy when searching for English words.
One Minute Gaelic -
A new online course teaching the basics of Gaelic. It's in form of a podcast with one minute per lesson.