About a week ago I learned about a website called Sayafter.me, a site for learning languages that is based on comparing one's pronunciation with that of a native speaker. At the moment it's only available to practice one's English, though the site owner says he will be adding other languages later. Because English is my first language I was able to verify at least that it correctly recognizes my pronunciation as correct (even though it was using RP and my pronunciation is Canadian), so far so good. I also had a Korean I know that doesn't know much English try it out and she got about 30 - 50% every time, also so far so good. But I'm curious to see what others at varying skill levels get.
If English is your L2 give this site a try and see what results you get, and let me know in the comments below. I'm curious about Olivier in particular.
Once other languages are added I'm going to try them out, and will be sure to not post about the results if my pronunciation is deemed to be bad.