Inetnun Kutturan Natibun Marianas/Kkoor Aramasal Marianas, the website of the CNMI's Marianas Indigenous Culture Association; go there to view the edited entries of the Revised Chamorro-English Dictionary
English-Chamorro Finder List for the Revised Chamorro-English Dictionary, posted on eScholarship and also available here.
Learning CHamoru, a useful site for learners
Lengguahi-ta, another useful site for learners, created by Schyuler Lujan
PulanSpeaks, a YouTube channel with videos on language and culture issues in the Mariana Islands, Micronesia, and the Pacific
Chamorro Grammar - Comprehension & Production, an Anki flashcard deck created by Ray Gil Untalan Bolden, focused on Chamorro comprehension and production; download Anki to view the cards.
The CNMI's Utugrafihan finu' Chamorro, the official version of their 2010 orthography
The CNMI's Chamorro orthography, the English version
Guam's CHamoru orthography, available from their Language Commission (Kumision I Fino' CHamoru)
My Two Chamorro Orthographies and Their Differences, on the differences between the CNMI's orthography and Guam's orthography (slides from the CCLPC workshop, Saipan, Mar 2019)
My Chamorro grammar (2020), posted on eScholarship and downloadable here
My Brief guide to comparing Topping & Dungca's grammar and Chung's grammar (2023)