One after another the source of the plugins will be added to the repository. A SVN repository will be used to hold the source code. To check it out a svn client will be needed. To install a SVN client on Ubuntu (and probably any Debian based distribution) just use the following command:
apt-get install subversion
For Windows there is a SVN client and library at SVNKit.com.
There is also a SVN plugin for Eclipse at Tigris.org.
To list the plugins manged by the svn repository use the following command:
svn list https://rpgnextgen.svn.sourceforge.net/svnroot/rpgnextgen/src
To check a plugin out use the following command line:
svn co https://rpgnextgen.svn.sourceforge.net/svnroot/rpgnextgen/src rpgnextgen