As you may have read from this post, I use Semiologic Pro and hence am able to take advantage of their 70+ plugins, even though I may not always use their theme. If you have seen the Wordpress that is integrated to my SiteProfitBot sites, it has been made possible because of the plugins offered by Semiologic.

I have separated my list of 37 default plugins on all my blogs into -

A. Semiologic Pro plugins
B. Other PAID plugins
C. Other FREE plugins

Here goes …

A. SemiologicPro Plugins (you can get them by buying a SemiologicPro license):

1. Autolink URI – Automatically wraps unhyperlinked uri with html anchors.

2. AutoTag – Leverages Yahoo!'s term extraction web service to automatically tag your posts.

3. Auto Thickbox – Automatically enables thickbox on thumbnail images (i.e. opens the images in a fancy pop-up).

4. Bookmark Me – Widgets that let your visitors share your webpages on social media sites such as Buzzup, Delicious and Digg.

5. Contact Form – Contact form widgets for WordPress, with WP Hashcash and akismet integration to fight contact form spam. Use the Inline Widgets plugin to insert contact forms into your posts and pages.

6. External Links – Marks outbound links as such, with various effects that are configurable under Settings / External Links.

7. Fancy Excerpt – Enhances WordPress' default excerpt generator by generating paragraph aware excerpts followed by more… links.

8. Feed Widgets – Creates a special sidebar that lets you insert widgets at the end of each post in your RSS feeds. Configure these widgets under Design / Widgets, by selecting the Feed Widgets sidebar.

9. Inline Widgets – Creates a special sidebar that lets you insert arbitrary widgets in posts and pages. Configure these inline widgets under Appearance / Widgets.

10. Mediacaster – Lets you add podcasts, videos, and formatted download links in your site's posts and pages.

11. Nav Menus – WordPress widgets that let you create navigation menus.

12. Newsletter Manager – Lets you readily add a newsletter subscription form to your WordPress installation. Use the Inline Widgets plugin to insert newsletter subscription forms into your posts and pages.

13. Redirect Manager – Lets you manage redirects on your site without messing around with .htaccess files.

14. Related Widgets – WordPress widgets that let you list related posts or pages, based on their tags.

15. Script Manager – Lets you insert scripts, on the entire site under Settings / Scripts & Meta, and on individual posts and pages in their respective Scripts & Meta boxes.

16. Semiologic Fixes – A variety of teaks and fixes for WordPress and third party plugins.

17. Semiologic SEO – All-in-one SEO plugin for WordPress

18. Subscribe Me – Widgets that let you display subscribe links to RSS readers such as Google Reader.

19. Unfancy Quote – Removes WordPress fancy quotes, which is very useful if you post code snippets to your site.

20. Uploads Folder – Changes your uploads' subfolders to a more natural yyyy/mm/post-slug for posts (based on the post's date rather than the current date), and page-slug/subpage-slug for static pages (based on the page's position in the hierarchy).

21. Version Checker – Allows to update plugins, themes, and Semiologic Pro.

22. Widget Contexts – Lets you manage whether widgets should display or not based on the context.

23. XML Sitemaps – Automatically generates XML Sitemaps for your site and notifies search engines when they're updated.

24. Semiologic Cache – An advanced caching module for WordPress.

25. Semiologic Cloner – Lets you clone a Semiologic Pro site. It also works with normal WordPress installations.

B) Other Paid Plugins:

1. Pretty Link Pro – Shrink, track and share any URL on the Internet from your WordPress website!

2. SLICK WP AutoPoster – You can drip feed highly targeted articles or combine news feeds, press releases in any combination all drawing the search engines to your blog every time a post is entered.

3. WP Robot – Automatically post content related to any topic of your choice to your weblog.

4. WP Unique – allows you to "uniquify" individual posts, automatically spin posts using an editable synonyms dictionary, and turn defined keywords into clickable links.

5. OptinPop Advanced - OptinPop is designed to help you build your blog subscriber list by showing your visitors a pop-up window containing the optin form of any webpage you create. You can tune the appearance of your pop-up window and other parameters on the OptinPop Settings page within the Plugins menu.

C) Other FREE Plugins:

1. Akismet -  checks your comments against the Akismet web service to see if they look like spam or not.

2. Different Posts Per Page – Show different number of posts in home, category, search or archive page.

3. Duplicate Post Checker – Easily check if you have already written the particular post, text or paragraph in your blog or not. An easy solution to avoid duplicate post or topic.

4. Exclude Pages from Navigation – Provides a checkbox on the editing page which you can check to exclude pages from the primary navigation.

5. Whydowork Adsense – Insert Adsense code in your pages without modifying the template. Show different ads for articles older than 7 days (or as old as you wish).

6. WordPress Database Backup – On-demand backup of your WordPress database.

7. WP-Sticky – Adds a sticky post feature to your WordPress's blog.