List of famous songs to learn musical intervals. Create your own custom lists with the interval song chart maker. A perfect starting point for ear training.
This website lists intervals and shows them on the treble clef. There are also tabs on the side to notation, rhythm, meter, tempo, musical form, scales, chords, and harmony.
This website has practice exercises for everything from note dictation and clef reading to harmonic progressions and the construction and identification of seventh chords. The "exercise" page, which this link goes directly to, houses all of the practice resources.
So this site has a variety of different intervals, scales, chords, and some melodies that you can use to help you identify the different names of intervals, notes andmelodies. Also has a perfect pitch trainer to help you work on your inner ear.
This site lets you practice identifying scales, chords, intervals, and chord inversions. There is also an app on the App Store that I'm pretty sure is free.
I don't care if this has nothing to do with interval ear training, I just found what this guy had to say about perfect pitch really interesting. I still have no idea if my pitch is actually perfect or not though haha.
"Cantorion is a free sheet music repository and a free concert listing diary that anyone can contribute to." This website is a good resource for written music and may assist in written theory and recognizing intervals. Also a great source for free piano music!
At around 50 seconds in, the trumpets go from an F to Bb, back down to an F. This is a Perfect 4th. Subsequently, they split where firsts go to a C, while, the seconds go to an F again, creating a perfect 5th.