Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
Xmind - Xmind is a brainstorming and mind mapping application.
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Midnight Commander - GNU Midnight Commander is a visual file manager, licensed under GNU General Public License and...
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.