Is there a way to track changes as one would in MS Word when collaborating with someone on code?

I am working with someone abroad on a project and I'm having trouble keeping track of all the changes they make and vice versa. Is the开发者_StackOverflow中文版re a software or code editor that will keep track of changes allowing other users to see what's changed?

Have you considered using source control?
Here are some (free) options. There are many of those, just look it up..