Question

I’m writting a php toolkit. I would like an open source license that requires a link at the bottom of page that says something like powered by toolkitName and links to my page that contains the source code and documentation. What license would have this?

Answer 1

sonds like a creative commons ( http://creativecommons.org/choose/ ). you may as well write your own license specifying this. qquoting:

“With a Creative Commons license, you keep your copyright but allow people to copy and distribute your work provided they give you credit — and only on the conditions you specify here. “

EDIT: wanted to check first. the BSD license might apply as well. from ( http://www.opensource.org/licenses/bsd-license.php ):

“Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.”