ApexKB (formerly Jumper), is a discontinued free and open-source script for collaborative search and knowledge management.

[1] It is powered by a shared enterprise bookmarking engine that is a fork of KnowledgebasePublisher,[2] and was publicly announced on 29 September 2008.

Users may tag, link, and rate structured data and unstructured data sources, including relational databases, flat file databases, medical imaging, content management systems, and any network file system.

[5] It is an interactive, user-submitted recommendation engine that uses peer-to-peer and social networking principles to reference any information located in distributed storage devices and capture the collective knowledge about it.

The app represents a fundamentally new approach to searching structured and semi-structured data using a Web 2.0 front-end where user-created tag profiles bookmark quality information resources, user contributed experiences add real-world knowledge about the information resources, and user-created reviews sort out the worthy resources from the inadequate[7] ApexKB is free and open-source, licensed under the terms of GPLv2.

They can also choose to create a new tag profile that references content, media, or data regardless of format or location.