Resources for learning Nynorsk
Nynorsk course by NTNU
NTNU university has created and published a free 8 video long program created to help you start learning nynorsk.Nynorsksenteret - A great website with nynorsk resources for all levels.
Teaching resources for those who will teach nynorsk to immigrants.
Ordbokene - Dictionary you can use for either only bokmål, only nynorsk or both.
Nynorskbok - Webpage that recommends books in nynorsk based on student age / level
Fremtida - Newspaper in nynorsk
Informational post by a native speaker that decided to dive deep into learning nynorsk. He lists a lot of great resources and details his own journey.
List of reading material - Available to read online for free (might require an Norwegian IP address)