I actually did this a little while ago, but i'm only blogging about it now.
I put the source of the TypeINT website up on SourceForge, under the GPL3.
For those of you who don't understand, i'll try to explain.
TypeINT is, right now, open source software. This means anyone can view the source of it. (The source is what makes it run.) SourceForge is a site that hosts sources, to put it simply.
The GPL is the GNU General Public License. It is the most popular open source license. They call it "copyleft". It states that anyone can view, modify, and redistribute the software, as long as they keep it under the same or newer version of the license.
So why did i do this? In part, to give whoever wanted to a chance to see the source. In part, to have an accurate record of past versions of the source.
The TypeINT project can be viewed at http://sourceforge.net/projects/typeint/
The SVN source at http://typeint.svn.sourceforge.net/