[bbrks]

MIT, BSD or Apache are fine. I try to avoid GPL as it tends to bring up more issues than it solves with the derived works clause.

http://choosealicense.com/licenses

[reiz]

Thanks for your input and the link. Any other licenses beside GPL you try to avoid?

[bbrks]

I rarely encounter software that isn't licensed under the big four mentioned above, so not really nope :)