Chatbots.org (BETA)
Overview of all chatbots (chatterbots, virtual agents, virtual employees) in the World (still populating). For fun, functional or exciting chat conversions with a chatbot.
Encarta NL (utility)

English summary: The Encarta Instant Answers Bot finds answers to questions asked in the conversation window. Textuel, audio and video content from the Encarta Encyclopedia web site is displayed in the so-called activty window next to the conversation. Users can ask questions like ‘What is the capital of Italy?’, ‘ I want to see the biography of Nelson Mandela’ of ‘2^2+4’.
Wilma (commercial)

English summary: Chat with WiLMa, the Windows Live Messenger Assistant, and learn more about all the new features in Windows live Messenger and more. Add WiLMa to your contact list and get the inside scoop on what's hot with Messenger.
Hillary Clinton (us elections)

English summary: The Hillary Clinton chatbot comes from Robotsin2008 which is a collection of virtual candidates that are taking part in the 2008 United States Presidential election. The chatbot is for entertainment purposes only, and not affiliated with any political party.
Barak Obama (us elections)

English summary: The Barack Obama chatbot comes from Robotsin2008 which is a collection of virtual candidates that are taking part in the 2008 United States Presidential election. The chatbot is for entertainment purposes only, and not affiliated with any political party.
Doctor Love (commercial)

English summary: Doctor Love asks daly questions about save sex.
Encarta D (utility)

English summary: English summary: The Encarta Instant Answers Bot finds answers to questions asked in the conversation window. Textuel, audio and video content from the Encarta Encyclopedia web site is displayed in the so-called activty window next to the conversation. Users can ask questions like ‘What is the capital of Italy?’, ‘ I want to see the biography of Nelson Mandela’ of ‘2^2+4’.
John Mccain (us elections)

English summary: The John MacCaine chatbot comes from Robotsin2008 which is a collection of virtual candidates that are taking part in the 2008 United States Presidential election. The chatbot is for entertainment purposes only, and not affiliated with any political party.
Inge (commercial)
since January 2008 in
Dutch

English summary: Inge is a chatbot/brand personality build by Cartesians & Asknow. She helps employees of Trias HealthInsurance.
Ron Paul (us elections)

English summary: The Ron Paul chatbot comes from Robotsin2008 which is a collection of virtual candidates that are taking part in the 2008 United States Presidential election. The chatbot is for entertainment purposes only, and not affiliated with any political party.
Abi Carver (commercial)

English summary:
Abi Carvar is a Second Life based Avatar chatbot.
She acts as a greeter for Daden at their Second Life Office on Daden Prime. Virtual world offices and shops are not manned 24/7 therefore ensuring visitors can interact with you is important. Many in-world developments have a simple "greeter" script, which just says a sentence as they arrive. Others will have "contact me" devices which let you page the owner. Some even have basic "tour guides". Simple chatbots can be a static or animated image on a virtual screen and can be wholly managed in-world.