Jon Udell
Lists of articles, usenet postings, and a book.
http://udell.roninhouse.com/

Bootstrap Institute
Doug Engelbart invented groupware. What's he up to now?
http://www.bootstrap.org/

Web Crossing
A leader in intranet/internet servers offering online conferencing solutions through discussion forums and chat rooms, with server-side scripting to allow web application development.
http://www.webcrossing.com/

Tricostar
Content management and customer service solutions such as help desk software, natural language search engines, and publishing personalization suites.
http://www.tricostar.com/

Software Andina, LLC.
Available for small to midsize businesses. Intranet, Paperless Office. Allows for shared contacts and calendars, automated expense reports and time-off requests. Full free demo of product on website.
http://www.softwareandina.com

OfficeClip.com:Connected Web Office
Offers address book, calendar, bulletin boards, group links, reminders, file sharing, project tracking, time and expense reporting, reservation and scheduling for groups.
http://www.officeclip.com

IntraLinks
Application service provider that offers Internet-based services that allow corporations and institutions to manage business-to-business communication.
http://www.intralinks.com/

Task manager for workgroups
Web based application that allows sharing task definitions, and subtask that can be assigned to different members of the workgroup. Changes in task are notified via e-mail to the whole group. Support for English and Spanish languages.
http://www.webtasker.com

PlaceWare Web Conferencing
Web conferencing offers a way for businesses to effectively communicate time-critical information. You can now conduct live interactive meetings or presentations with anyone using only a Web browser and a phone.
http://www.placeware.com/

Office Tracker Scheduling Software
Room scheduling software solution for appointment scheduling and calendaring of rooms, meetings, people, facilities and resources. Web based option available.
http://www.milum.com

CyberScheduler
Internet based calendaring and scheduling program for workgroups for any browser and Palm Pilot.
http://envicon.com/e/cyberscheduler/

Centrinity
Provides unified messaging and collaboration software solutions for businesses and education. Products include FirstClass Intranet Server Gold, FirstClass Collaborative Classroom, FirstClass UM, and Zebu.
http://www.centrinity.com/

Wegabyte
Windows freeware and shareware programs such as ICQ plug-ins, LAN tools kits, Winpopup, Zippi, Lantalk, and mICQ.
http://www.wegabyte.com

TeamAgenda
Offers a cross-platform group scheduler and resource manager for Windows and Macintosh. Utilizes real-time communication to coordinate teamwork, plan meetings and manage resources.
http://www.teamsoft.com

PHONEslips
Office automation software handling phone messages, memos, e-mail, contacts, schedules and to-do lists for everyone in the office. [Commercial, trial version]
http://www.phoneslips.com/

Sherpa Software Group, L.P.
Company manufactures utility software products for Lotus Notes and Microsoft Exchange. Includes, Mail Attender, Database Attender and Directory Attender. Registration required for all product evaluation versions, documentation, white papers, and presentations.
http://www.sherpasoftware.com/

AyaNova
Offers computerized work order, service call management, knowledgebase, and technician job scheduling software.
http://www.ayanova.com/

Ever America
Provides mission critical software to Local Government, Utilities and ESCO's. JPHI's SuiteResponse software line includes: Financials, Groupware, Budgeting, Utility Billing and Customer Information Systems.
http://www.ever-america.com/

WebBoard
Conferencing software that adds online conferencing and IRC chat capabilities to your Windows 95/NT web server (BBS software for the internet.)
http://www.akiva.com/products/webboard/

Web Calendar
Web-based calendaring and scheduling system for personal, group, and corporate events. Includes download, documentation, and help. [Perl, GPL]
http://www.math.utexas.edu/webcalendar/

Business Collaborator
Flexible internet based collaboration software which can be used out of the box or customised to the clients specific requirements.
http://www.groupbc.com

BSCW: Basic Support for Cooperative Work
Simple Web based groupware system
http://bscw.fit.fraunhofer.de/

Office.com
Web-based collaboration software application providing remote access to calendar, address book, email, and documents.
http://www.office.com/