Frisian-English dictionary & multilingual: Dutch, German, Danish,
French, Latin
Frisian-German dictionary (Saterland Frisian)
etymology of some Frisian words
Wörterbuch der ostfriesischen Sprache: East
Frisian-German dictionary, by Jan ten Doornkaat Koolman (1879)
Ostfriesisches Wörterbuch: East Frisian-German
dictionary, by Cirk Heinrich Stürenburg (1857)
Glossarium der friesischen Sprache, besonders
in nordfriesischen Mundart: North Frisian dictionary, by Nicolaus Outzen (1837)
Proeve van een friesch en Nederlandsch woordenboek:
Frisian-Dutch dictionary, by Montanus Hettema (1831)
Altfriesisches Wörterbuch: Old Frisian-German
dictionary, by Karl von Richthofen (1840)
West Frisian course & grammar
East Frisian grammar (Saterland Frisian)
Phonology & grammar of modern West Frisian
by Pieter Sipma (1913)
glossary
Frisian-English
Die nordfriesische Sprache nach
der Föhringer und Amrumer Mundart: grammar of the North Frisian, by Christian Johansen (1862)
Die nordfriesische Sprache nach
der Moringer Mundart: grammar of the North Frisian, by Bende Bendsen (1860)
Frisische Sprachlehre: Frisian grammar
by Rasmus Rask (1834)
The Frisian language and literature, historical
study by Waterman Thomas Hewett (1879)
books about Frisian language: Google
books & Internet
archive
linguistic map of the Frisian language,
in the past & today
linguistic
map of the West Frisian, spoken in Netherlands
linguistic map of the North Frisian,
spoken in Germany
Omrop Fryslân: online radio & television (Friesland)
Us Heit: Lord's Prayer in Frisian (with sound)
It Ewangeelje fen Matthéwes: The Gospel of Matthew
translated in West Frisian, by Justus Hiddes Halbertsma (1884)
Altfriesisches Lesebuch: Old Frisian reader with
a grammar and a glossary, by Wilhelm Heuser (1903)
Alle minsken wurde frij en gelyk yn weardigens en rjochten berne.
Hja hawwe ferstân en gewisse meikrigen en hearre har foar inoar oer yn in geast fan bruorskip te hâlden en te dragen.
First article in many languages
Declaration of Human Rights: bilingual text in Frisian, Danish & other languages
Netherlands: maps & documents
Germany: maps & documents
Dutch - Low German & (High) German
languages
Germanic languages (in French)