Whisker menu - A menu that provides access to favorites, recently used, and searching installed applications.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Cardapio - Cardapio is an application menu that can work in two modes: as a panel applet (in which case it is...
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
GnoMenu - A consolidated menu for gnome that brings eye candy to the world of the Gnome menus.
Weava - Workspace to highlight, organize & collaborate on your research articles.