Discuss sqlmap, an automated tool for sql injection and database takeover in 500 words or more. How does it work? Where do you get it? How much does it cost? Who developed it? For what purpose? Are there other ‘tools’ like this available?

Discuss sqlmap, an automated tool for sql injection and database takeover in 500 words or more. How does it work? Where do you get it? How much does it cost? Who developed it? For what purpose? Are there other ‘tools’ like this available?