TreePad Lite (freeware) and TreePad Asia (freeware) are small and powerful personal database programs, only 600 Kb in size. They allow you to store all your notes, emails, texts, hyperlinks, etc. into one or multiple databases. With the look and feel of the familiar Windows explorer, editing, storing, browsing, searching and retrieving your data can not be easier!
http://www.treepad.com/treepadfreeware/