Qiqqa is award-winning research management software, designed for commercial and academic researchers.

Paperpile is a web-based reference management software, with special emphasis on integration with Google Docs and Google Scholar.

Reference.com is an online encyclopedia.

Wordnik is an online English dictionary and language resource that provides dictionary and thesaurus content.

JabRef is a reference management software that uses BibTeX and BibLaTeX as its native formats and is therefore typically used for LaTeX.

BibDesk is an open-source reference management software package for macOS, used to manage bibliographies and references when writing essays and articles.

colwiz (collective wizdom) is free web, desktop and mobile based research management software.

iTunes U is an educational platform for iTunes.