Homepage: http://bochs.sourceforge.net/
For the reason to include this in the repository my thoughts would be because ; Its lightweight , its pretty straightforward(as what i've heard) , it can always come in handy for many others who will have a need to use it and of course its an free software.
Is it open source: Yes I believe it is reading under License : "This program is distributed under the terms of the GNU Lesser General Public License as published by the Free Software Foundation."
Link : https://sourceforge.net/projects/bochs/files/bochs/2.6.11/bochs-2.6.11.tar.gz/download