BibCompanion

BibCompanion is basically a BibTeX database (.bib file) editor, however, it is beyond an editor but a bibliography management system for everyone.

It has quick and easy search function, as well as smart/manual libraries to classify bib items. Both of them provide efficient ways of accessing to desired articles. Furthermore, each bib item can have attached files such as PDF files, so that BibCompanion is very useful for daily use in addition when you preparing a paper.