There are lot of word press themes out there. It’s time consuming to find suitable theme for your blog.  I think 3-column themes give more options for your blog. If you are thinking of trying a new theme or looking for a new theme, these themes look solid. They are widget ready and easy to customize.  Demo link is also provided for convenience

1) Blog oh Blog [Download] [Demo]

Clean, simple, lightweight theme. widget ready with sitemap

2) Blog Pixel [Download]

Rounded corners, clean theme, available in other colors

3) Padangan [Download] [Demo]

This theme is widget ready and ads ready. Have 2 right side columns and extra footer information.

4) Black and White Theme [Download] [Demo]

Black and White is Google Ad sense ready and it is optimized for search engine. This theme has 2 right widget ready side columns and three 125px ad squares.

5) Prosense [Download] [Demo]

Seo and adsense ready theme. Clean theme. Available in other colors

6) TyreMonkey [Download] [Demo]

A hot red and cool black color combination. Good to use on blogs for sports and tech tips.

7) iPhone Theme [Download] [Demo]

This theme is very well designed and is compatible with WordPress 2.2 and later versions. Works fine with Firefox, IE and Safari.

8 ) Free Revolution [Download] [Demo]

Revolution is a simple and excellent 3-column theme for WordPress. The 2 side columns are placed to the right hand side.

9) Green Park 2 [Download] [Demo]

Widget ready theme supports various color schemes 3-column/fluid design.

10) Xplosive Reloaded [Download] [Demo]

Vibrant red header with two side columns on the right side.

11) Deep Blue [Download] [Demo]

This theme has many features like customizable sidebars, Ad sense integration, etc.

12) RockinBlack [Download] [Demo]

Cool black and white screen with side columns on either sides.

13) BeeVon [Download] [Demo]

Brilliant dark background that highlights the contents and allows easy readability

14) BizFresh [Download] [Demo]

Widget ready and you have the option of two or three sidebar and you can even position the sidebars on either side.

15) iLeather [Download] [Demo]

Gives your web site a premium look with a clean and clear leather look

16) jDolores [Download] [Demo]

This theme has right hand sidebars with rounded edges

17) Pride [Download] [Demo]

Light in graphics and two sidebars are present towards right side.

18) YGo Lonely [Download] [Demo]

Widget ready theme with black and white colors that gives the style to the theme.

19) Unleashed [Download] [Demo]

Unleash the real style of your web site with this widget ready WordPress theme.

20) Blackvivi [Download] [Demo]

All black with grey and white highlights and white text great look

21) Dark Zen [Download] [Demo]

Good theme for article hosting web sites and supports Ad sense and widget ready sidebars.

You can always count on wordpress theme directory for more themes.