I too have developed my own database for my collection. Mine is a web front end on top of a relational database. I did it this way because I hardly ever use a Microsoft OS and wanted to learn how to build a web application. One of the best features (I think) is the ability to export the database onto my PDA. That way I can have it with me when I'm away from my computer. If there are enough developers interested, I could make the source available for others to help. One of the big features I'd love to add is multi-user support. Jeff