Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
GeoSpark - Location tracking SDK with 90% less battery drain 🔋
Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
Pilgrim SDK - Foursquare's superpower is now available to all developers
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Hit Me Up! - Get notified when your friends arrive/leave a location!