Login Security Solution is simple way to lock down login security for multisite and regular WordPress installations.
PanoPress allows easy embedding of 360° Panoramas & Virtual Tours created with a variety of applications using Flash & HTML5.
P2 Resolved Posts is a lightweight GTD plugin for WordPress and the P2 theme which allows you to mark a thread as “unresolved” when there’s something needing to be finished, and mark it as “resolved” when it’s been finished.
Social Web Links will display elegant icons of your social profiles on a sidebar widget.
Twitter Tools creates a complete integration between your WordPress blog and your Twitter account.