Open Source software for maintaining a Library

Slashdot has a cool Article on Open Source software for maintaining a small to medium sized library
card-catalog. Someone asked for, and got, many suggestions.

\” It seems all the tools are available: a perl module for working with MARC records,
several for working with Z39.50 and XML, and even a web site apparently devoted to nearly this exact
topic. An actual, working, catalog, however, seems to be missing. Is this something that would be valuable?
I, for one, have nearly 5k volumes in my collection, and they\’re begging for some discipline.\”

Be sure to check out oss4lib.org is this kind of thing interests you. Open Source = Free