| Name | Website | Online Demo | OPAC, Acqusitions, Cataloging & Circulation | MARC Support | Platform | Latest Release* | Other Key Information |
| Koha | http://www.koha.org | Demo | Yes | Yes | LAMP (Perl) | 2.0.1: Released 2004-08-26 | First OSS Library Management System |
| Emilda | http://www.emilda.org/ | Demo | Yes | 100% MARC Compatible using Zebra | LAMPP (Perl & PHP) | 1.1.0: Released 2004-01-23 1.2-beta: Released 2004-08-22 |
Customizable template based layout |
| PhpMyLibrary | http://phpmylibrary.sourceforge.net/ | Demo | Yes | Strictly follows the USMARC standard for adding materials | PHP & MySQL, Apache | 2.0.3: Released 2004-10-25 | Originally developed for Win32 (MS Windows) |
| OpenBiblio | http://obiblio.sourceforge.net | Demo | OPAC, Cataloging & Circulation | UNIMARC Support | LAMP (PHP) | 0.5.0: Released 2004-07-05 | Includes staff administration & reporting functionality |
| Avanti MicroLCS | http://www.avantilibrarysystems.com | No | OPAC & Cataloging | No | Written in 100% pure Java | 1.0 beta 3: Released 2004-06-14 | Implememtation Neutral & Platform Independent |
| PMB: phpmybibli | http://www.pizz.net/ | Demo | Yes | UNIMARC Support | LAMP (PHP) | 1.3: Release date unknown | Includes Authorities Management & Periodicals Support. In French. |
| Gnuteca | hhttp://www.gnuteca.org.br/ | No (?) | Unknown | Unknown | PostgreSQL | 1.5: 2004-09-08 | In Portuguese. |
* Latest release dates were updated on November 9, 2004.
*** Avanti MicroLCS 1.0 Beta 4 is due out soon.