Have you ever had a colleague or learner send you a file you have no idea how to open?

If the answer is yes, then you should visit...

OpenWith.org, a site that helps you find the program that will open whatever file you have — most of the time with free software.

• Search for your mystery extension
• OpenWith will find a program that can read it.
• You can also download a handy desktop tool to make looking up extensions even easier.