Metacat

Morpho   (Compare Project)

Mostly written in Java

License: gpl

DataONE   (Compare Project)

License: apache_2

OMERO   (Compare Project)

Mostly written in Python

License: gpl

Ecological Metadata Language   (Compare Project)

Mostly written in XSL Transformation

License: gpl

GeoNetwork opensource   (Compare Project)

Mostly written in JavaScript

License: gpl

CDO Model Repository   (Compare Project)

Mostly written in Java

License: eclipse

Jena   (Compare Project)

Mostly written in Java

License: apache_2

Razuna   (Compare Project)

Mostly written in JavaScript

License: Unknown

Tracker   (Compare Project)

Mostly written in C

License: gpl

Geoportal Server   (Compare Project)

Mostly written in C#

License: apache_2