How many times has this post been made on numerous sites? There are countless number of them out there. I couldn’t even imagine how many there are. But I’m gonna post this anyways, because these are the plugins that I personally could not live without on any of my WordPress sites.

1. After the Deadline. If you’re like me and don’t have perfect grammar, then this plugin is definitely for you. Not only does it check for spelling errors but does a pretty damn good job.
2. All in one SEO Pack. This plugin does a Really good job at making most of your SEO ready. It doesn’t do everything for you, but it does enough in my opinion. This is a must for every site.
3. Now Reading Reloaded. This plugin isn’t for everybody, since it’s a plugin that keeps track of the books that you’ve read. However for those who want to keep track and show the books they’ve read, this is probably one of the best plugins I’ve seen out there. It has customizable templates and a widget to display the books on the sidebar.
4. Subscribe to Comments. This is something that should be built into WordPress in my opinion. But, what can you do, so this plugin works. This plugin allows you to opt in to receive emails when a new comment has been posted on a post you’ve commented on. Definitely should be built in.
5. Text Replace. This plugin will search through your posts and replace it with something else which you specify. I use this plugin to replace the names of friends to links to their website or set acronyms for certain words. I definitely recommend it.
6. WordPress Mobile Edition. This is a great plugin to easily make your site view-friendly to mobile phones. I recommend it because everyone should have a mobile version of their site without having to do their own browser checking.
7. WP-Polls. For polls to attach to your sidebar (with a widget) or posts, this is by far the best plugin I have ever seen. You should be using this if you have polls.
8. WP Ajax Edit Comments. I like to have my users able to edit their comments just in case they made some grammar errors or perhaps they forgot to mention something else. So without having to enter another comment, this allows them to edit their comments without leaving the page. Very useful plugin for admins as well since you can easily edit comments on the comment page.
9. WP lightbox 2. This plugin automatically puts your linked images in your posts as lightbox style images. You know, the method where it blacks out the page and displays the image only without having to leave the page. Very cool effect.
10. WPtouch iPhone theme. This plugin, like the mobile edition plugin, will display a different version of your site, completely customizable for iPhone, iPod touch, and touch screen type phones. This is the same thing that is used on wordpress.com. I love it!