Invitation to ETI
Invitation to ETI is a web-based scientific Search for Extra-Terrestrial Intelligence (SETI) experiment, inviting intelligent extraterrestrials to establish a dialog with humanity. The Invitation is issued by a multi-disciplinary group of nearly 100 scholars from around the world.
http://www.ieti.org/

DaVite Invitation System
A web invitation system that one can install it on your server and customize it to fit your needs.
http://marginalhacks.com/Hacks/DaVite/

SendAnInvite
The latest in Online Invitation services. For both social and business events. Features include RSVP's & management, accept payments, event reminder service, Guest Polling, and MORE!
http://www.sendaninvite.com/

BB-Bid
Bid solicitation and management system that enables companies to build, customize, and maintain their invitation to bid lists in an online format.
http://bbbid.thebluebook.com/

The e-Nordic Summit
An invitation-only event for senior e-business professionals. Presents solution providers e-business in areas such as consultancy services, CRM, security, EDI, knowledge management, portal development, and electronic procurement. Conference is in Oslo, Norway, December 2-4, 2002.
http://www.enordic-summit.com/

Sportsvite
Find players, games and activities, recreational leagues in your area; Manage your teams schedule, roster and events; connect with other members and players in your area; learn more about your sport with videos, articles and postings from other members.
http://www.sportsvite.com/

What's New With PCI
Download the invitation of the latest workshops available.
http://www.pcisig.com/events/compliance_workshop

Shimka
ETF Investment, Stock/Real Estate Investment, Bilingual (English/Japanese) News/Official Report Database, Investment Blog Website & Translation Service dedicated to Financial Field by a Japanese Canadian Freelance Translator who worked for an American Financial Firm for 20 years in Tokyo.
http://www.shimka.com

That Invitation Place
That Invitation Place, wedding invitations, parties, aniversary announcements, christmas cards, birth announcements and holiday invitations
http://www.invitationplace.com/

aSmallWorld
A private online community designed for those who already have strong connections with one another. By invitation only.
http://www.asmallworld.net/