If you are interested in Grabilla infrastructure here’s some information for you.
Domain: domain is registered and maintained at GoDaddy.
Nameservers: we use GoDaddy nameservers, ns07.domaincontrol.com. and ns08.domaincontrol.com.
Hosting: main server is hosted at Linode.
Balancers: we use Linode load balancers.
Code: PHP for server, jQuery and Bootstrap for web part, Qt for desktop application.