multiroom audio cheap open source solution

1) Server: Logitech Media Server
source: https://github.com/Logitech/slimserver
binaries: http://downloads.slimdevices.com/

2) Client: SqueezePlay / squeezelite
source: http://svn.slimdevices.com/repos/jive/
binaries: http://wiki.slimdevices.com/index.php/SqueezePlay_binaries

squeezelite instructions one post below

3) Remote: Squeezer
source: https://nikclayton.github.io/android-squeezer/
binaries: aptoide / playstore?