[archevel]

Would creating a GPL or BSD licensed project and then contribute to that work (in case the employer allows work on FOSS)? Then one would presumably be free to start a business using that software after quitting. Also if it's BSD licensed there's nothing preventing one from close sourcing the stuff after quitting. Of course the code would potentially already be out in the world and used if it's in a public repo...

[SteveNuts]

Be careful, some employers consider any work done on any project during work hours (or on company equipment) their property.

[archevel]

Wouldn't the fact that if they are ok with you working on FOSS protect you? If you have the source you are free to modify it to you hearts content, right?