This document compares and summarizes several bibliographic management tools: EndNote, RefWorks, Zotero, citeUlike, Connotea, and 2collab. It discusses their key features such as database searching, organizing references, attaching files, formatting citations, platforms, sharing capabilities, and integration with word processing software. EndNote is very full-featured but expensive, while Zotero and citeUlike are free but more limited. RefWorks and 2collab focus on collaboration and sharing references between groups.