BibTexMng - Windows program for manipulating BibTeX database files. News, screenshots and download. - http://www.latexsoft.com/bibtexmng.htm
Pub2Bib - Free Windows program that converts PubMed (Medline) database records into different file formats, e.g. BibTeX, HTML and CSV. - http://www.harvey-semester.de/software/pub2bib/
BibEdt - Open source minimal BibTeX editor for Windows. News, screen shots and SourceForge project page. - http://bibedt.sourceforge.net/
BibDB - A BibTeX database manager running on Windows (DOS and 16-bit) for creating, maintaining and updating literature reference libraries, in a format which is compatible with BibTeX. - http://www.mackichan.com/index.html?bibdb/