Maple Professional - 7.16

The flagship of the tree outline managers for power users. It enables you to create hierarchical trees for storing information such as documents, notes, and images. You can create unlimited nodes and sub-nodes and assign any document to each node. You can easily create a backup copies of your trees with a backup system and encrypt confidential documents. It supports rich text formatting as well as drag-and-drop.

Version 7.15 has added media library and fixed Windows 9x incompatibility.