Weblog: Elgg comes with a personal and friends weblogging system. This weblog is a central piece and can link to items in the repository. Each weblog post can be shared with who ever the learner wants.

Social networking: Elgg is all about the creation of a learning landscape therefore it is necessary to link to, and find, others with similar interests. Elgg uses social networking as a means of finding and sharing knowledge with others.

File repository: Elgg has a file repository which can be used to house many different file types.

Access control: This is one of the strongest features in Elgg, a powerful access system allows fine-grained privacy to all aspects of an individuals Elgg.

Tagging: This is now a popular way to search and find other objects and people of similar interest.

Customisation: Elgg comes with some standard templates, however, we recognise the need for people to customise their own landscape. This is done through the templating system.

XML-RPC: use external blogging clients to post to an Elgg site.

Community building: using the communities function learners can create their own communities around shared interests. This is also proving popular for research collaboration.

Wiki: Integration with MediaWiki

Profile data: link to other learners and resources through your profile data.

Syndication: RSS - there are RSS feeds for learners, weblogs, communities, tags, files and FOAF.

Podcasting: Elgg is an extremely effective podcasting platform.

Reference: Http://elgg.org/