SQLmap is a penetration testing tool that automates the detection and exploitation of SQL injection flaws in web applications. It provides a powerful engine to perform a wide range of SQL injection attacks. OWASP ZAP and Burp Suite are more generalized web vulnerability scanners and are not specialized in automating SQL injection exploitation to the extent SQLmap is. Aircrack-ng is tailored for wireless network security and is not used for attacking web application vulnerabilities like SQL injection.