Recommended Web Applications

• Gmail

• Google Calendar
• 30 Boxes

Others: CalendarHub

• Toodledo
• Remember The Milk
• Do.com
• Hiveminder
• Checklist

• Can't recommend any at the moment

See also: 8 Replacements for Google Notebook
Perhaps: Backpack, Evernote, ubernote, Diigo (especially if also used for bookmarking)

• Doodle
• WeJIT

• Google Docs
• Zoho Sheet

• Zoho Writer
• Google Docs

• PDFonFly
• HTML to PDF Converter

• PDFescape
• Samuraj Data's PDF Viewer … online viewer for PDF, PostScript and Word

• del.icio.us
• diigo
• pinboard.in: small life-time fee, but ad-free and more KISS

See also http://historio.us/ + shaarli (a self-hosted solution)

Currently, I cannot recommend any (haven't tried them). For an in-depth comparison see TechCrunch: Nine Ways to Build Your Own Social Network by Mark Hendrickson. This article is from July 2007, but it at least shows what to look for.

• Flickr
• 23 Photo Sharing
• Google's Picasa

• Pixenate: simple and does the trick
• Pixlr: sophisticated (requires Flash)

See also: Five Best Online Image Editors (2009-07-05)

• Bubbl.us
• yEd Graph Editor

Others: Gliffy, Cacoo, Creately

• Dropbox
• Wuala

• IDrive
• Mozy

• BaseCamp
• CentralDesktop

• Side Job Track

• SlimTimer

• http://www.bloglines.com AKA Netvibes … comes with a dashboard but can be switched to a folder based style
• Google Reader scheduled to be shut down June 30, 2013.

Perhaps: The Old Reader, Good Noows

• None! All the ones we knew of (cocomment, commentful, co.mments, comment-tracker) are gone for good

Sources

• The Web and what I use personally
• http://web2.wsj2.com/the_best_web_20_software_of_2005.htm (2007-11-05)
• http://www.governmententerprise.com/news/192300492 (2006-12-01) but not available anymore, apparently now available as http://www.informationweek.com/news/showArticle.jhtml?articleID=192300492 (2007-11-05)

Keywords: todo, personal, pim, social networking, collaboration, web 2.0, web2.0