I've put together some custom package repositories for RHEL/CentOS 7 - only x86_64 available
http://awel.domblogger.net/7/php/
That has php 5.6.0 - which isn't something I would suggest putting on a server (I would but I like pain) as it is fresh and does break some webapps, but if you develop php webapps, you should probably have 5.6.x on a dev server.
http://awel.domblogger.net/7/media/
That has FFmpeg and dependencies, I had a need for an FFmpeg build capable of eating almost anything and spitting out HTML5 formats - I think that one does it.
http://awel.domblogger.net/7/gstreamer/
That depends upon the media repository for dependencies. The GStreamer in RHEL/CentOS 7 is old, too old to decode VP9 - so that GStreamer replaces the stock GStreamer with current.
It also provides many plugins that RHEL/CentOS + EPEL do not.
http://awel.domblogger.net/7/misc/
Misc. crap - basically rebuilds of Fedora 20 src.rpms that for whatever reason are not in EPEL
http://awel.domblogger.net/7/crypto/
My crypto-currency repo
Right now the only real thing of interest there is namecoin - the bitcoin RPMs are just rebuild of http://www.ringingliberty.com/bitcoin/ so just use his if bitcoin is all you are interested in.
The namecoin right now is only daemon (that's all I ever use anyway) but I will build the qt in a week or so.
And I will then add quarkcoin and then start work on getting armory packaged.
-=-
Anyway - for CentOS/RHEL 7 users - I thought those might be of interest to some of you.
CentOS 7 really is a decent Desktop OS once you replace the Gnome 3 shit with Mate and update the GStreamer.
All of the repos use EPEL for dependencies, but no other external repos are needed.
All packages are built with mock and signed.