I will make a small off-topic question. I really like the ISC license but for a small snippet of code I think that it's still to big. I choped some parts and got it to this:

Copyright (c) 4-digit year, Company or Person's Name

Permission to use, copy, modify, and/or distribute this software for any purpose is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE.

Would this be a valid open source license?

I am not using this license for anything big. Most of my code is pretty much useless and for the code I consider more useful I use the ISC license.