Executable PHP Widget
Like the Text widget, Executable PHP Widget allows you to enter custom text to the sidebar using a widget. However, what the Text widget lacks is what the Executable PHP Widget makes up for – PHP capability. With this plug-in you can use PHP without editing your source files.

AdSense
A simple but extremely helpful plug-in if you want to insert AdSense in the middle of your posts. Using an <!–adsense–> tag, you can place your advertisement wherever you see fit.

ShareThis
At the end of every post should be an option for the reader to publicise the post further. ShareThis gives the reader a wealth of options – including emailing the post to a friend.

WP Greet Box
If someone arrives via a search engine, or DIGG, greeting them could make them a subscriber. WP Greet Box does just that – it welcomes new readers to your site, and asks them to consider subscribing. All the messages are customisable depending on where readers arrive from.

Clean Archives Reloaded
The calendar isn’t all that helpful. A page full of every post on your site sorted chronologically is. Clean Archives Reloaded helps you achieve that. (Look at out Archives page for an example)

BONUS: Don’t forget our own plug-in, PostLove, that displays your most popular posts for your visitors to read.

I’m very excited to see people download it! I feel like a little geek.