Maple Pro offers all
the functionality that I need. It's clear and easy to learn. I greatly appreciate the user interface: it seems to be designed to serve people, rather than to impress them.
Maple Professional is the flagship of the tree
outline managers for power users.
The price per single-user license is US$
31.95. No subscription: you will get a lifetime license to the current version and and free upgrades for one year. If your company or institution is interested in licensing
Maple Professional for several users, you can save a lot of money
by purchasing a multiple-user license. Please click
here for details.