Business Organizations, Companies, Blogs and Websites on Twitter.

Companies & Organizations

• CASS Central Arizona Shelter Services, the largest capacity homeless shelter in Arizona.
• Chattanooga Market - Chattanooga's largest community market & art festival
• City of Casa Grande Library, Casa Grande, AZ USA - reading recommendations with links to its online catalog
• Fizzari - Makers of performance road bikes and mountain bikes.
• Health Care For All - a state-based, non-profit consumer health care advocacy organization in Massachusetts.
• Innocent Smoothies (lovely UK drinks company, innocent drinks)
• Joyent
• Los Angeles Fire Department
• Make - MAKE Magazine
• MARTÍN SOTELO® Consultores y Abogados - Full-service law firm, based in Madrid, Spain - Homepage - MinorCelebrities
• Marvel - comics, movies and games (See summary article)
• MY Nautilus One - Maldive diving trips by Nautilus Tauchreisen
• Oriental Trading Company
• Babel Media - Game testing company, uses Twitter to recruit new games testers
• San Francisco Zoo 
• STAR-TIDES - a research effort to encourage information sharing and develop Communities of Interest to support populations in stressed environments
• Wiltshire and Swindon Archives - list of historic documents currently being used (details here)
• WUW The Webcash_Universocial_Web - Free personal webcashmotor's register & delivery
• Russische Frau - New classifieds from Partnervermittlung Ukraine
• Public Citizen - A national, nonprofit citizen advocacy organization that fights for health, safety and democracy.
• Invention Resource International - Invention assistance organization.

Software

• Adobe Flex
• BMC Software
• Drupal
• Firefox - web browser
• Netscape - web browser
• Opera - web browser
• Oracle
• Plone - content management system
• Textpattern - Textpattern CMS, open-source content management system
• WordPress - blogging software
• Acronis - storage management and disaster recovery software

Blogs

• A Healthy Blog
• Bloggers Blog
• I Can Has Cheezburger? - LOLcats blog, ICHC
• Nerd Beach - Interesting Things Washed up from the Cyber Sea Nerdbeach.com 
• Linking money by Mousephone 4G3W - Datevaluation's upgrade for the Classic Economy 
• SocialEarth - social entrepreneurship news

Arts Organizations (Theatres, Dance Companies, Museums, etc.)

• Repertory Theatre of St. Louis - Missouri's most-honored live, professional theatre 

Websites, Social Networks, and Web Applications

• 30Boxes - 30boxes.com
• Bookring Directory - connected to BookCrossing.com
• Cafe TweetSpot - New!  Share, develop, find, or be inspired by business ideas.
• deviantART - deviantart.com
• DemystifyingDigital.com - Dan Havlik and Maryan Pelland tweeting
• Flickr - flickr.com
• Mininova - Mininova.org, torrent site
• Monster - monster.com
• Media Temple - mediatemple.net 
• OnMyList - onmylist.com
• PBWiki - pbwiki.com
• Ravelry - Knitting resource and networking site, Ravelry.com
• Technorati - technorati.com
• URL Tea - urltea.com
• Woot! - woot.com

Twitter Applications

• SnapTweet - Flickr/Twitter mashup
• TweetUps
• Twitterdildonics 
• Twit4 Directory - Find schools, companies and organizations using twitter. 

Religious

• Buddhism
• TricycleMag - Tricycle Magazine
• ForestHermitage - Wat Pah Santidhamma; Warwickshire, UK
• Longquansi - Longquan Monastery; China
• LYWA - Lama Yeshe Wisdom Archive
• Christianity
•  
• Islam
•  
• Judaism
•  

Unsorted

See Organizations (unsorted) page.