The KiWi core system is a flexible platform for building different kinds of semantic social software applications on top (currently the Semantic Wiki and the TagIT application). It provides all the core services required in such applications, like editing and tagging, the storage of content and associated meta-data, its own triple store, transactions and versioning over content and meta-data, a linked open data server, and many small features semantic social software developers will like (like convenience services for working with ontologies or SKOS thesauruses, etc.).
COCANWIKI is a full-featured Wiki and content management system. It has many unique features not found in any other Wikis including live preview when editing, advanced navigation (including the ability to follow links in both directions), PIM/calendar extensions, user permissions, customisable page layouts, virtual hosting (handling more than one Wiki per server), search, anti-spam, and email notifications.
The Informa RSS Library provides a convenient Java API for handling news channels and metadata about them. Different syntax formats (like RSS 0.91, 1.0 [RDF], 2.0, and Atom 0.3) for feeds are supported. There is also basic support for channel information descriptions (OPML). A full-text engine (Lucene) can be used for indexing and searching the news items. Two backends for storing the data are currently provided: In-Memory and Hibernate (which allows you to persist news items into allmost any JDBC compliant database).
Haystack is a powerful tool designed to enable each and every individual manage all of her information in the way that makes the most sense. By removing the arbitrary barriers created by applications that only handle certain information "types", and recording only a fixed set of relationships defined by the developer, users can define whichever arrangements of, connections between, and views of information they find most effective. Such personalization of information management will dramatically improve your ability to find what you need when you need it.