Learn Kurmanji – Has several lessons with videos, audios and explanations. Great for beginners.
WikiFerheng/WQ Ferheng – an excellent dictionary app for smartphone users, which also works with no internet connection. Translation from English to Kurdish and Kurdish into a wide variety of languages, plus much of the Turkish and Arabic vocabulary used here.
Books to download:
Kurmanji Kurdish For The Beginners – A good book, though it contains a lot of Sorani vocabulary.
Hinker 1 – First book of the Hinker series. A great resource for exercises. Entirely in Kurmanji without any explanations in English.
Hinker 2 – Second book of the Hinker series.
Learn Kurdish – a multi-level course in Kurmanji with a focus on grammar.
Kurdish-English dictionary – available to download here.
Dersa Kurdî – Series of 60 videos in Kurmanji. Useful for listening practice. Other more difficult videos are also on the channel.