Nice 1min monitoring time that will show us if something went down. Best visualisation and fastest downtime detection. Pingdom
We are using Skype to help your customers in realtime. Sometimes you need to chat or talk with customer right away and this is best option for us right now. Skype
We are using Braintree that is PayPal company for our payments on our website. No more redirects to PayPal :-) PayPal
DNS Hosting for all of our customers we don't need to worry about our own DNS Servers.
Railgun Optimizer, CDN Cache and Free SSL of course. CloudFlare