TreePad X Enterprise (384 Gb, single-user)
Next generation Personal Database, Word Processor and Organizer with the unique ability to access, edit, store and search databases of up to 384 Gigabytes. Additionally, up to eight databases can be opened simultaneously! TreePad X Enterprise has been redesigned from the ground up using the most... Yet more POWERFUL FUNCTIONS instant data saving, history back/forward/list, favorite files, skinning, bookmarks; disk and file catalog, full-screen presentation mode, dynamic fields, print preview; drag-drop; zoom; calendar; a multitude of import/export options; auto-save; auto-dial,...
http://www.treepad.net/download/install_tpxsu2.exe - 4Mb - Download - Screenshot

TreePad X Enterprise (12 Gb, single-user)
Next generation Personal Database, Word Processor and Organizer with the unique ability to access, edit, store and search databases of up to 12 Gigabytes. Additionally, up to eight databases can be opened simultaneously! TreePad X Enterprise has been redesigned from the ground up using the most... map, 100-level undo/redo, second editor pane (draftpad) etc. ... ATTACHMENTS: include files of any type and reasonable size; TREE copy/paste, expand/collapse, mass node mover dialog with dual tree pane, (reverse-)sort, number tree, drag-drop tree-nodes, copy subtree directly to another database.
http://www.nlsoftware.com/download/install_tpxsu1.exe - 4Mb - Download - Screenshot

Akti Planner
Akti Planner is a visual time organizer and tracker that can manage several people schedules simultaneously. It features the unique ability of handling recurring and any level nested appointments. Using these features, you always can model complex schedules and do time tracking with maximum... Auto scheduling. ... Changing recurring appointments on the fly. ... Backup and restore database functions. ... Before and after appointment alarms. ... Unique system that shows differences between actual and planned appointments.
http://www.aktisoft.com/AktiPlanner.exe - 1Mb - Download - Screenshot