The best open source software from this category:
KeePass Password Safe
KeePass Password Safe is a free, open source, light-weight and easy-to-use password manager for Windows. You can store your passwords in a highly-encrypted database, which is locked with one master password or key file.
Freemind
A mind mapper, and at the same time an easy-to-operate hierarchical editor with strong emphasis on folding. These two are not really two different things, just two different descriptions of a single application. Often used for knowledge and content mgmt.
floAt's Mobile Agent
FMA is a SMS Manager, Mobile Phone Monitor, Remote Control Agent, Phonebook Manager, Organizer, Fun and much more; whatever you want it to be, it is whatever a mobile phone should have :-) (Currently based on Sony Ericsson features set).
Biet-O-Matic (Bid-O-Matic)
Yet another sniper tool :-) BOM ist a tool to watch and bid on auctions. Many features like mail control, autoconnect/disconnect, integrated ODBC- client, multi-language-support, time sync, item grouping etc.
