I have 211 language names and I want to visualize them in a meaningful way. The first thing are language families, but besides that there are other "levels" of relationships.
Is there a software which allows me to create a tree out of those 211 items by drag-and-drop?
The software should be gratis and I have to be able to run it without problems (=> ubuntu or web-services). There should be an export option of the result. Preferably textual, but if the graphics are good enough an image could be fine, too.