1. Jolt 2: A major vulnerability has been discovered in Windows networking code. The vulnerability allows remote attackers to cause a DoS attack against Windows-based machines - the attack causes the target machine to consume 100$\%$ of the CPU time on processing of illegal packets.

2. Nemesy: This program generates random packets of spoofed source IP to enable the attacker to launch DoS attack.

3. Targa: It is a program that can be used to run eight different DoS attacks. The attacker has the option to launch either individual attacks or try all the attacks until one is successful.

4. Crazy Pinger: This tool could send large packets of ICMP to a remote target network.

5. Sometrouble: It is a remote flooder and bomber. It is developed in Delphi.