How to: DNS Rebinding
https://github.com/nccgroup/singularity
# Singularity of Origin is a tool to perform DNS rebinding attacks. It includes the necessary components to rebind the IP address of the attack server DNS name to the target machine's IP address and to serve attack payloads to exploit vulnerable software on the target machine.

https://github.com/brannondorsey/dns-rebind-toolkit
# DNS Rebind Toolkit is a frontend JavaScript framework for developing DNS Rebinding exploits against vulnerable hosts and services on a local area network (LAN).

https://github.com/brannondorsey/whonow
# A malicious DNS server for executing DNS Rebinding attacks on the fly.

https://nip.io
# Dead simple wildcard DNS for any IP Address

https://sslip.io
# sslip.io is a DNS (Domain Name System) service that, when queried with a hostname with an embedded IP address, returns that IP Address.

http://1u.ms/
# This is a small set of zero-configuration DNS utilities for assisting in detection and exploitation of SSRF-related vulnerabilities. It provides easy to use DNS rebinding utility, as well as a way to get resolvable resource records with any given contents.

https://github.com/Rhynorater/rebindMultiA
# rebindMultiA is a tool to perform a Multiple A Record rebind attack.