I'm trying to find open-source implementations of Trees (not binary) like Red-black, B-Trees, 2-3 Trees, or General Tree, ideally for Squeak/Pharo, but any other implementations in other Smalltalk flavor will be fine too. I've seen SqueakSource but there are too many binary trees packages and most of them seems to belong to students projects. Do you know tree implementations?
In http://www.squeaksource.com/BTree.html you find a B-Tree implementation that is extensively used in many commercial applications.