GRC.COM by Steve Gibson

https://www.grc.com/ is run by Steve Gibson. He has many great utilities and has a Security Now podcast. I can't recommend them strongly enough.

• GRC "Perfect Passwords" Generator https://www.grc.com/passwords.htm
• Spinrite hard disc recovery and maintenance http://www.grc.com/spinrite.htm
• SecurityNow podcast with Leo Laporte http://www.grc.com/securitynow.htm
• ShieldsUP! https://www.grc.com/x/ne.dll?bh0bkyd2
• SecurAble http://www.grc.com/securable.htm