Loebs offer a side-by-side translation of Greek and Latin texts. They are helpful to check when you’re unsure of your translation, or you can read Loebs to get a general sense of what is going on in a passage.
Perseus is a tool that students can use to help understand the vocabulary and grammar of a passage. You can click on a word in a classical text and Perseus gives the possible meanings of the word and its potential parsing. It is helpful to use Perseus while you are translating, but you should try not to depend on this tool.
The Scaife viewer is similar to Perseus but it has a user interface that some might find easier to navigate. It has fewer texts available than Perseus, but they are working to add more. You can use the Scaife viewer if you like to annotate your texts.
Latin Tutorial on Youtube is a resource that uploads videos on grammar and interesting Latin commentary. There are some line-by-line translations of the Aeneid that go through grammar and vocabulary. These videos are helpful to quickly review grammatical constructs.
Searchable access to both the original Lewis & Short and Lewis & Short's Elementary Latin Dictionary, accompanied by learning tools such as flashcards.
A collection of guides and exercises designed to accompany Donald Mastronarde's Introduction to Attic Greek textbook, but useful for any beginning student of classical Greek.
Eidolon was an online, informal journal publication that ceased publication in 2020. This website is great to read about current scholarship, thoughts, and opinions about the field of Classics, and there are some interesting niche articles that you might find intriguing.