Discover 101 of the Most Powerful and Free Wordpress Plugins!  One of the major components of WordPress are its plugins. There are currently 47,457 plugins in the Wordpress repository. Most can be used to their full ability for free.

License Terms:

[YES] Can be used for your personal use
[YES] Can be given away
[YES] Can be sold
[YES] Can be packaged with other products
[YES] Can be offered as a bonus with other things you sell
[YES] Can be added to paid or free membership sites
[YES] Can be offered through auction sites
[YES] Can sell with Resale Rights
[YES] Can sell with Master Resale Rights
[NO] Can sell with Private Label Rights
[NO] Can be modified in any way