Video Onclick – Simple wordpress plugin, which adds youtube or vimeo videos to your blog. Playback in full customizable popup window. Error reporting about videos, that were deleted since you added them to your post.
Plugin shows twitter links from backtweets.com in widget area. It shows “shortened” links like bit.ly, goo.gl and other link shortering services.
Disqus is nice comments system, but realisation for wordpress does not support dofollow commentators links. There is a nice way to make disqus comments dofollow, without updating troubles.
Now my blog is dofollow. You can leave comments. After 3 comments your links become dofollow. I’m going to delete any link, that I suspect being spam.
Nginx is lightweight and quick http server. It is usually used as a caching proxy for apache or php-fastci. I prefer using php-fastcgi. Here is howto, which allows nginx to use static pages, generated by WP Super Cache.