| Abora Hypermedia Project Hypertext system supporting fine-grained links, transclusions and user link filtering. http://www.abora.org/ |
| Assoziations-Blaster Network that connects text through automatic, non-linear real-time linking. http://www.assoziations-blaster.de/ |
| StumbleUpon Free web-browser extension which acts as an intelligent browsing tool for discovering and sharing web sites. http://www.stumbleupon.com/ |
| The Mole Software analyzes the context in which words and sentences are used and dynamically links their relationships. http://www.themolesite.com/ |
| Udanax Offers open-source license, philosophy behind the systems, an FAQ and an e-mail discussion list. http://www.udanax.com/ |