Googlepack is the best free collection of software on the Web.
According to Google, it features:
Google Earth - 3D Earth browserZoom from space to street level - tour the worldFind maps, driving directions, hotels, restaurants, and more
Google Desktop - Desktop companionFind all your email, files, web history, and moreGet all your personalized info in one place with Sidebar
Picasa - Photo organizerFind, edit, and share your photos in secondsEasily remove red eye and fix photos
Google Toolbar - for Internet Explorer - Search toolbarSearch from any web page and autofill formsBlock annoying pop-ups
Google Pack Screensaver - Photo screensaverEnjoy photos from your personal collectionView pictures full screen or as a collage
StarOfficeFree - Word processor, spreadsheet and presentation software
Skype - Make free voice and video calls to anyone else on SkypeCall landlines and mobile phones at pretty low rates
Mozilla Firefox - with Google Toolbar - Web browserBrowse the web quickly and securelySwitch between pages quickly with tabbed browsing
Norton Security Scan - Antivirus utility
Adobe Reader View, print, and search PDF files.