WordPress Plugin Suggestions Welcome

As mentioned in this post, Software Gadgets is now running WordPress. This is the first time I've really used WordPress and I'm overwhelmed by the number of plugins. I have decided to start slow as I suspect too many plugins can quickly bog down a a shared server. At the moment I am just using three plugins:

• Akismet 1.15 which checks comments against the Akismet web service to see if they look like spam or not.
• Bad Behavior 2.05 which should denies automated spambots access to this site.
• SimpleTags 2.0 which creates a list of Technorati tags at the bottom of my posts from a comma separated list of tags between a pair of special tags.

I'm sure I will add a few others (or perhaps even replace some of these) over the next few weeks. I'm open to suggestions, so if you know of a WordPress plugin that you think is impossible to live without please suggest it. Plugins have to be compatible with this theme, actually useful, stable, and easy on the server for me to seriously consider using them.

[tags]wordpress, wordpress plugins[/tags]