HowToWebmaster.com

Here are two of my favorite free logo makers online.

https://logoshi.com/logo-maker
This site will give you a bunch of logo ideas and designs

http://www5.flamingtext.com/net-fu/dynamic.cgi?script=birdy-logo&text=Example
You can make really cool text logos with flamingtext. I use this to quickly make text logos for almost all of my sites.