Well, as mentioned there were several ATG rockets with AT work appearing late in the war. Rather more common was the use of the Bordrakete 21cm (BR 21 or WrGr 21), adopted from the Army`s five barreled Nebelwerfer, and containing a serious sized warhead with a GP fragmantation warhead. Fighters carried a pair, larger craft : 4 to 6 of these. In effect, it meant that a 4-plane fighter Schwarm could effectiely match the broadside of a typical ww2 heavy cruiser..
But generally speaking, the LW preferred anti-tank/anti personell cluster bombs over rockets, covering a rather large area with hundreds of small sized (2-10kg) fragmentation or AT bomblets with cumulative warhead - the latter could pierce up to 100mm of armor, and since it usually hit the rather thin top armor of tanks, it was very effective. Such bombs could be mounted on just about any LW plane, fighters and bombers alike.
It made quite some sense given the relative ineffectiveness of ww2 unguided rockets - most of them carried only fragmentation warhead, and were ineffective vs. armor even in the unlikely case of scoring a direct hit, due to their great inaccuracy.
Speaking of rockets, I would like to learn about RAF aerial rockets of ww2 ! I have plenty of info on Soviet, US, and German, but could not find the details and types of those used by the RAF, ie. Typhoons etc.