Some e-mail from the MinionPro LaTeX package mailing list this morning reminded me that it is worth also pointing out MnSymbol and providing a comparison. It is generated from a METAFONT source, where the vast majority of its symbols are rendered using round brush.
MnSymbol is intended as companion for Adobe Minion Pro, but I personally do not really see that. The symbols that do come with Minion Pro all have flat endpoints. It does not come with
\rrbracket, so I've replaced those with capital X.