No wonder why it’s a nightmare to support your application across all platforms and browsers. There are few good resources out there that help to quickly test applications on multiple browsers, platforms and devices. Organization who don’t have any standard as to which browser should be supported and which should not be; or don’t maintain and enforce the list of approved applications can benefit from these services / solutions.
I recently found the modern.ie. That saved me tens of hours of work for few MS Project Server EPM & SharePoint features.
Microsoft Site that offers compatibility reports, browser screenshots, site scans and even free VMs with Ie6 to IE 11 for testing. you can download the test VMs for Windows, Mac or Linux and for Hyper-V, Vmware, VirtualBox and few other visualization platforms. After downloading VM, with 5 minutes I was able to validate the MS Project Server EPM scenario with IE 10.
Browser Stack is paid service (as low as $35/m for 2 users). Browser based and doesn’t require VM deployments.