Finnish

Pimsleur: Conversational Finnish 
Lessons 1–16
FN 1.001

Finnish Dictionary & Phrasebook Finnish–English & English–Finnish
Ville Kataja © 2002
New York, NY: Hippocrene Books, Inc.
ISBN: 978-0-7818-0956-6

Digital Dialects
Basic Finnish lessons through games

Finnish Sound Structure: Phonetics, phonology, phonotactics and prosody
By Kari Suomi, Juhani Toivanen, and Riikka Ylitalo © 2008 University of Oulu, an advanced book (PDF) about Finnish pronunciation

Memrise
User-created Finnish courses

Tavataan taas!
Online short course by the University of Helsinki

Uusi kielemme — Finnish for Busy People
Grammar reference, extensive vocabulary lists, book recommendations.

VISK — Ison suomen kieliopin verkkoversio
Reference book for Finnish grammar (in Finnish) by Kotus, The Institute for the Languages of Finland.

Wikipedia
Articles on the Finnish languageFinnish grammarFinnish phonologyFinnish orthography, and colloquial Finnish.