Qnotero

Qnotero provides lightning quick access to your Zotero references. Zotero is an open source reference manager, program, Qnotero which lives in the system tray and allows you to search through your references by Author and/ or Year of Publication. If a PDF file is attached to a reference you can open it directly from within Qnotero. Qnotero is the successor to Gnotero, which is now unmaintained but still available.