Digital preservation: Archivematica

Archivematica is a free and open-source digital preservation system that is designed to maintain long-term access to digital memory. Archivematica is packaged with the web-based content management system AtoM for access to your digital objects. (Wiki)

More info: Project and DATools

Digital curation: Designated Community

The OAIS definition of Designated Community is: 

An identified group of potential Consumers who should be able to understand a particular set of information. The Designated Community may be composed of multiple user communities. A Designated Community is defined by the Archive and this definition may change over time.

CLOCKSS: Designated Community definition

 A guide to participating in an Open Source Software community by OSS Watch

Old maps

Old Maps Online has been created by Klokan Technologies GmbH, specialists in online map publishing and in applications of open-source software.

Stellarium

Stellarium shows a realistic sky in 3D

Scalar: ebooks in open source

Link: Introducing Scalar. Born-digital, open source, media-rich scholarly publishing that’s as easy as blogging.