These are the latest published :
1- 'GrblController-3.6.1.7z' for MAC OS X 10.8, 10.9, 10.10 by 'hezhao'
: you must decompress for 'GrblController-3.6.1.dmg'
2- 'GrblController361Setup.exe' for Win32 by 'zapmaker'
3- 'GrblControllerLinuxInstallerx86-3.6.1' for Linux 32 bits by 'zapmaker'
4- 'GrblControllerLinuxInstallerx64-3.6.1 ' for Linux 64 bits by 'zapmaker'
For Linux it may be necessary to run this command before installing. I hope to remove this dependency at some point. Also, chmod 755 the installer file you downloaded so you can run it. After installing, GrblController executable will be found in ~/GrblController folder:
sudo apt-get install "^libxcb.*" libx11-xcb-dev libglu1-mesa-dev libxrender-dev