BibTeXSearch is described as 'A scientific record discovery tool'. There are seven alternatives to BibTeXSearch, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and Google Chrome. The best alternative is Zotero, which is both free and Open Source. Other great sites and apps similar to BibTeXSearch are Mendeley (Freemium), JabRef (Free, Open Source), ZoteroBib (Free, Open Source) and BibDesk (Free, Open Source).
Zotero is a free, easy-to-use Firefox/Chrome extension or standalone program to help you collect, organize, manage, search and cite your research sources directly in your favourite word processor, with 300 MB free online storage.
Mendeley helps manage and share academic knowledge: Mendeley Desktop is free academic software (Windows, Mac, Linux) for organizing and sharing research papers and generating bibliographies with 1GB of free online storage to automatically back up and synchronize your library...
The efficient way to collect, organize & discover Collect Import options for over 15 reference formats Easily retrieve and link full-text articles Fetch complete bibliographic information based on ISBN, DOI, PubMed-ID and arXiv-ID Import new...
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.
BibDesk is a bibliographic reference manager for Mac OS X. BibDesk is designed to help organize and use bibliographic databases in BibTeX .bib format. BibDesk integrates well with TeX for creating citations and bibliographies.
Bibfilex is a free bibliographic manager for GNU/Linux, Windows and OS X. It's useful to create and to manage archives of bibliographical items (books, articles, etc.) with possible attachments of any kind according to Biblatex structure and rules.