The Best Things in Life Are Free

Storage

Adrive: 50GB of online storage and backup for all file types; free basic service
JZip: data compression utility
Mozy: 2GB of online, data and remote backup solutions; free basic service

Financial

BizEquity: company valuations
Mint: personal finance, money management, budget planning and financial planning software
MyBizHomepage: financial dashboard for small business QuickBooks users
QuickBooks: small-business accounting software; free download (Simple Start 2008)
Wesabe: financial advice, analysis and planning

Content/Media/Video

Audacity: open-source software for cross-platform audio recording
Blip.tv: video blogging, podcasting and video sharing service; free basic service
BlogTalkRadio: radio network for users to host their own shows
DropShots: video hosting and photo sharing
FeedBurner: media distribution services for blogs and RSS feeds
Fix My Movie: video enhancement service; free basic service
Paint.NET: image and photo editing software
Phixr: picture and photo editor
Seesmic: video conversation platform
SlideShare: share and embed slideshows, PowerPoints and PDFs into web pages
VideoSpin: video-editing software

Marketing/Networking/PR

Blogger: blog publishing tool
Craigslist: online classifieds and job postings network
CollectiveX: create social networking and collaboration sites for groups
Entrepreneur Connect: Entrepreneur's social networking site
LinkedIn: business social networking site
Pligg: open-source, community-centric site for discovering, rating and sharing content
PolicyMap: geographic and demographic information system for creating custom maps, tables and charts; free basic service
YouNoodle: networking for startups and valuation with Startup Predictor
Your Pitch Sucks?: PR pitch reviewing and advising

Office Productivity/Organizational