Arbalet

Arbalet is a Java tool to view and manipulate phylogenetic trees and compute their Parsimony score.
With Arbalet, given a file of taxa and a tree in Newick format you can:
visualize a parsimony tree and the score of its nodes
Scroll and zoom to examine some part of the trees
Export the tree as an image (PNG, SVG, ...)
Compare two trees in terms of number of operations to transform one tree to another