Today Internet is full of spam & spammers everywhere. It must taken care that your blog has to be safe from the attack of spammers.
Lots of Plugins are available at Official WordPress Plugin Portal to block spam, but very few plugins work effectively.
WordPress Blog comes with Akismet Plugin & Hello Dolly Plugin, so you don’t need to find that plugin.
Here we are talking about the Plugin which I have tested Myself & Works very well i.e. Bad Behavior.
Bad Behavior works very effectively against spam comments & pingbacks.
You can Download this Plugin From Here : Download Here