Either in Anime or Manga, which Dragon Ball crossovers are there? I've seen this one which mixs Dragon Ball with One Piece with Toriko. Is there any other? Cameos don't count, such as Arale cameos in Dragon Ball or Dragon Ball cameos in Arale.
As per the one piece fandom wikia there is only a single dragon ball crossover with toriko and two more episode with the toriko in anime.
There is a collaborative work from both the writers of respective manga called cross epoch featuring dragon ball and one piece.