The Open Source software I use is pretty reliable and on the edge of what technology has to offer. Here is a list of what I currenly am using

I use Jekyll to generate this site

I use Github Pages to host the site

I use Patternfly for my UX/UI

I use FreeIPA for authentication

I use Openstack for my IaaS layer

I use Openshift Origin for my PaaS layer

I use Ceph for my storage

I use Asciibinder for Documentation

http://jekyllrb.com/

https://github.com/donnydavis/donnydavis.github.io/

http://www.patternfly.org/

https://www.freeipa.org/

https://www.rdoproject.org/

https://www.openshift.org/

http://ceph.com/

http://asciibinder.org/