A while back I hacked up the juce text editor to support justification, I was going to post it here but then justification got added to the real juce text editor and I thought it was pointless. However, the juce text editor apparently doesn’t support vertical justification, so apparently this isn’t useless after all.
Anybody is free to do with it whatever they want. The license is GPL since juce is GPL, but you can also use it freely if you have a commercial juce license.