What services or software do you use for infrastructure support?

Currently we use MailTrap for testing with PeopleSoft for email notifications, and we have a test SFTP server from Attachmate we use for testing file transfer automation. We are now looking to add some sort of uptime monitoring, is there anything you have used and have found works well for testing URL and server uptime, with reports especially? Also do you have any other infrastructure setup that you would suggest others use for regular support?

@Thomas-D-Andrea Google Compute Engine has got an intuitive dashboard that enables users to easily track live server stats.Easy to configure the VM to scale based on demand and can be resized with close to zero downtime. Most importantly, it has a clear and well documented API. Users can easily migrate their VMs thanks to CloudEndure agent.