Latin Language Learning Materials
Fontes Discenti Latinam
Grammatica
New Latin Grammar (Project Gutenberg)
Grammar Examples
Haggis
Latin Grammar (in Medieval Portuguese)
Oxford Latin Course
Elementa linguae Daco-Romanae, sive Valachicae
Online Grammar through Texts
Latin Grammar Aid with list of other resources
Latin Wikibook
Latin Grammar (in Medieval Italian) (link temporary)
Modern Indo European Grammar, very interesting, has much information on history and dialects
He really put Albanian grammar into 17 pages and called it a day
Donatus ad Lectorem (I'll try to get a source other than Archive which is banned on my school network.)
Ars Grammatica
A tibetan reader
Part of the Apology of Socrates. I am still scanning it so it isn't complete and many pages are sideways (will upload the finished one asap!) If you are the publisher, please email conlangmaker11@gmail.com if this violates copyright (I don't think it does) and I will take it down.
Oxford Grammar of Classical Greek
Art of Grammar by Dionysus Thrax
Doctrinale Alexandri Grammatici cum commento
Dari Phrasebook (I know this is completely unrelated I'll clean this sit up soon)
Romani Grammar
Dictionaria
Wiktionary - my choice for translation. Works English to Latin. You can look up non lemma forms which is probably the best feature.
Wikidot Latin Dict. Very clunky, enter an infinitive/lemma and cross your fingers.
Latin Picture Dictionary from the Minimus series
Whitaker's Words (thx sid!)
Haketia Dictionary
Visual MSA Dictionary
Dictionarium Palaeoslovenico - Graeco - Latinum, or, an Old Church Slavonic - Latin/Greek Dictionary
Printable Latin Mini Dictionary
Libri/Fons
Latin Library
Printable Vol 1 of Institutiones of Justinian
Tibetan Reader
Thesavrvs Anbrvtalis
Vera Historia Quinti, a comic book in Latin
Other Lists of Resources
Lexicity (Has resources for languages other than Latin as well)