Unicornscan is an attempt at a User-land Distributed TCP/IP stack. It is intended to provide a researcher a superior interface for introducing a stimulus into and measuring a response from a TCP/IP enabled device or network. Although it currently has hundreds of individual features, a main set of abilities include:
- Asynchronous stateless TCP scanning with all variations of TCP Flags.
- Asynchronous stateless TCP banner grabbing.
- Asynchronous protocol specific UDP Scanning (sending enough of a signature to elicit a response).
- Active and Passive remote OS, application, and component identification by analyzing responses.
- PCAP file logging and filtering.
- Relational database output.
- Custom module support.
- Customized data-set views.
Get it from http://www.unicornscan.org/