No 6. Antivirus for WordPress

As it turns out, viruses and worms exist for WordPress too and hence, protection against them is mandatory. These malicious codes can attack your WordPress installation and send your blog reeling. This plugin, scans and detects such malicious injections and warns you using email notifications. A must have plugin.

Go here to download.

No 5. Admin SSL

This plugin can secure your WordPress URL using private or shared SSL. The plugin can secure the login page, admin area, posts or any other page. It also forces SSL on every page where password can be entered. WordPress 2.2 to 2.7 is supported.

Go here to download.