1. Akismet Plug-in: Akismet is a great plug-in to prevent your blog from comment and track-back spam. Akismet is now embedded in WordPress core and come with WordPress by default. It does a good job of picking up spam. Akismat uses a centralized database of spammer IPs and can recognize 99% + spam successfully. Akismet is a must for every blogger. To make Akismet work at your blog you need its API key. Akismet API key can be aquired by registering at WordPress.com. 2. reCaptcha Plug-in: Large nu