DSpace 3.0 was officially released to the public on November 30, 2012. The previous version of DSpace was 1.8.2 and DSpace has changed its numbering scheme and this is explained here. The demo version of this release is available for testing here.

The new DSpace 3.0 comes with a number of new features.There are two groups of features, those that are enabled by default and those that require deliberate activation.

Default features

• Completely rewritten OAI-PMH interface  
• Google Analytics support for JSPUI
• Batch import for Bibliographic formats (Endnote, BibTex, RIS, TSV, CSV)
• Controlled Vocabulary support for XMLUI
• Improvements to Authentication by Password

Activation features

The features listed below are included in the DSpace 3.0 release but they are enabled manually.

• Item Level Versioning
• Enhancements to Discovery (including hit highlighting & search snippets)
• Mobile Theme for XMLUI (beta)
• Advanced Embargo Support
• Type based Submissions.
• Elastic search usage statistics. 

DSpace 3.0 can be uploaded at

• SourceForge (Zip): https://sourceforge.net/projects/dspace/files/ , and
• GitHub: https://github.com/DSpace/DSpace (tag 'dspace-3.0')

Url for more information https://wiki.duraspace.org/display/DSPACE/DSpace+Release+3.0+Notes