WordPress theme framework are very useful for creating the wordpress themes faster. WordPress framework are readymade wordpress themes with all the pages. Some of them are seo friendly also. So that will save your lot of time while creating the wordpress theme.
The best part of wordpress framework is, If you are not having any php programming knowledge then also you can easily develop the wordpress theme fast. You just need some CSS and HTML knowledge.
Here I created I list of free wordpress theme frameworks which are very useful for wordpress theme developers and designers.
This list created by wordpressapi.com. If you are knowing about more free wordpress theme framework then please write to me and put a comment.