Use common sense when using programs that deletes/downloads things.
Skype -- Video chatting
Tokbox -- Free [group] video chatting conferences
Digsby -- IM+Email+Social Networking
Atube Catcher -- Downloading videos for presentation, projects, personal use, etc.
Classic Start Menu -- Changes the theme of your start menu. It has different themes and almost fully customizable to your standards.
VLC media player -- I like it
ManyCam -- I find it more versatile and easier to manage compared to my hp webcam software
RevoUninstaller -- Not only does it uninstall your software, it also deletes the things stored in the registry
MP3Tag -- Usefull for converting music formats, mass tagging, editing song information, etc.
Currently out of the hobby
Forum lurking every now and then