The best open source alternative to Zotero is Qiqqa. If that doesn't suit you, our users have ranked more than 50 alternatives to Zotero and 18 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Zotero are JabRef (Free, Open Source), Paperwork (Free, Open Source), BibSonomy (Free, Open Source) and WizNote (Paid, Open Source).
WizNote is a Note software, which is especially designed for Internet users and mobile Internet users. WizNote focuses more on notes of rapid collection, management, reading and sharing. WizNote is smaller, more stable, and more suitable for computers, phones and mobile devices.
Powered by the same technology behind Zotero, ZoteroBib lets you seamlessly add items from across the web — using Zotero’s unmatched metadata extraction abilities — and generate bibliographies in more than 9,000 citation styles.
A new FREE citation generator. Automatically create bibliographies, references, and citations in APA, MLA, Chicago, Harvard, and over 8000 more styles with a totally free and no-ads citation generator.