wxSword is hosted by SourceForge and is an open-source program designed to be used in conjunction with the Sword Bible software, available at Crosswire's website. You must first download and install Sword in order to be able to use this software. It is designed using the wxWidgets library, which is another prerequisite for the program.
Downloading the source is as easy as following the link to the project site and following the link to download the sources off of CVS. Currently the project is still in the Alpha stage, but once a beta release has been made, a release tar of the sources will be made available on Sourceforge for downloading.
Thanks to Sourceforge for providing hosting for this project!