Which licenses are free for commercial use?
I'm lost in a mass of licences - GPL, LGPL, Creative Commons, BSD, Apache, etc, and looking for a beginners guide.

When using a component under a popular licence like these, what are the restrictions for using them without paying in a commercial product?

E.g.
- do I have to redistribute the source?
- do I have to credit them?
- what if I modify the component?
etc.

From what I can tell from http://www.codeproject.com/info/Licenses.aspx, only GPL and Creative Commons force you to redistribute source?
Which licenses are free for commercial use?
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I'm lost in a mass of licences - GPL, LGPL, Creative Commons, BSD, Apache, etc, and looking for a beginners guide.

When using a component under a popular licence like these, what are the restrictions for using them without paying in a commercial product?

E.g.
- do I have to redistribute the source?
- do I have to credit them?
- what if I modify the component?
etc.

From what I can tell from http://www.codeproject.com/info/Licenses.aspx, only GPL and Creative Commons force you to redistribute source?