I’ve been using the program Cmap Tools lately to create professional looking mindmaps. Here are a couple I’ve made for teaching Russian – I grabbed some grammar explanations (from Schaum’s Outline of Russian Grammar) and dictionary definitions (from Rambler) to create these mindmaps.
Use of the particle “бы” in Russian
Some prefixed forms of the verb “давать/дать”
Cmaps is a program that you can download and use on your computer; a good online alternative (no downloads required) is bubble.us.