MusicTheory.Net- Great for basic note-naming practice. Make sure to adjust the settings to your instrument. Here is a PDF I put together of specific exercises on each instrument!
Note Zapper- Make note learning into a game! A fun twist on note identification that makes it more fun with an added challenge.
Music Racer- This can test both note identification and instrument fingerings! The downside is that it doesn't give immediate feedback, but you can compete for the fastest time and highest accuracy.
Rhythm Trainer- A challenging game that tests your ability to match a written rhythm with the correct sound, or vice versa.
Sound Innovations Online- This is a great resource that is FREE with a purchase of the Sound Innovations Book! It has additional music, as well as interactable songs so you can hear what each song is supposed to sound like. Perfect for at-home practice!
MakeMusic- You do need a subscription for full access, but you can access several method books with the free version! Just type the name of your method book into the search bar (i.e. Sound Innovations, Essential Elements, etc.) and find the band book. The nice thing about Make Music is that you can also record your playing to see how accurate it is, and play along with soundtracks to each song.
MuseScore- There are so many songs you can access on here for free! Perfect for finding fun solos and pop songs. While you need a subscription for full access, you can probably get most of what you need with the free samples. Google any song and add "musescore" and your instrument- you'll be surprised at what you can find!