Back into uncharted IANAL territory again with software licenses. Before I start posting code on this blog I wanted to get licensing out of the way for the Java library I'm writing.

Do any of you have opinions on a good open source license to use? Here is my intent:

1. Any changes or additions made to the library should be contributed back to the project.
2. Open and closed source projects are free to use the library as long as the project gets credit somewhere.

Anything else I should be worried about?

So far I'm considering:

Common Public License (CPL) Version 1.0
GNU Lesser General Public License (LGPL)

The GNU General Public License (GPL) is too viral to be used in this case since any program that uses GPL code must also be GPL. That violates term #2 above.