You said you were looking for virtual machines so I looked around the VMWare appliances and found two you might be interested in
http://www.vmware.com/appliances/directory/289
Trac
Python
Subversion (Client and server components)
Apache web server
PostgreSQL
MySQL
SQLite
The underlying operating system is OpenBSD.
ruby18-base-1.8.4nb1 Ruby 1.8 based release minimum package
ruby18-subversion-1.3.0nb3 Ruby bindings for Subversion
Only thing this is missing is PHP and Ruby on Rails which shouldn't be to hard to install on your own.
http://www.vmware.com/appliances/directory/134
Apache2 (2.0.54)
PHP (4.4.0)
MySQL (4.1.12)
PostgreSQL (8.1.2-1)
phpPgAdmin (3.5.6)
Ruby 1.8.4
Ruby on Rails (1.1.2)
They both seem to contain most but not all of what your looking for.
This last link seems to have Ruby and php but I'm not sure what else. Not going to check a torrent site a work lol.
http://www.kickasstorrents.com/ubuntu-php-ruby-on-rails-django-web-development-vmware-appliance-t3040351.html
Hope this helps