Three column blogspot templates always give a professional look to your blogs. It looks stylish, you can add more links to sidebars, can use more widgets and can customize it the way you want. More ever it’s the perfect template if you are willing to work with blogspot. I am adding few three column blogspot themes here, hope you would like them.
3-column
templatesAndreas4 – Another popular WordPress template by Andreas cloned for
Blogger. The template can be used as a bare bone structure for customization.
Autumn Grass – I like the
color combination and the vertical menu links in the header. There is also sufficient space there for ads and videos.
Beautiful Red Apple – Another nice WordPress theme converted into a
Blogger template, has a 940px width frame, lots of space and customization possibilities.
Butterfly Magic – Another beautiful
color combination, or shall we call it just another butterfly effect
Clean Elegant – Here’s one for all you Photoshop lovers, though we could do without the Adsense ad box, which spoils the whole meaning of the template.

Columnas – This theme’s peculiar design stands out from the rest of the
templates in this list. Nice and clean.
Cultivado – Neat, floral, elegant – this one’s perfect for writing on life, philosophy, thoughts, poetry, love and the like.

Dark Ritual – A nice theme which somehow reminds us of Adams Family.

Erudite – A neat three-column
Blogger template with the black color header and the orange color RSS icon gelling well.
Fluid Solution – Another cool
black and white look.
Fresh Blogger Template – A fresh looking (it really is) green and blue theme. Great usability.

Garland – Drupal’s default look copied to

Glow – If Hellboy or Flash Gordon wanted to blog, this is one template they might like.

Green Marinee – A long time favorite of many bloggers ported to
Blogger. Great use of space, and a nice color combination.
Hemingway – A beautiful dark template – one column for the post body and three column on the footer.

Illacrimo – A beautiful clone for
Blogger from the WordPress theme Illacrimo, though I feel there should be a way to use more space currently taken by the date-display on the left of the screen.
Informativo – A similar template to the Columnas template above but with the
header, for the less-unconventional bloggers who wants to stick with the proven.
Likewise v1.1 – A clean white template with one column for the post and with three column footer on a black background.

Magazine-Style – A nice template if you have a lot of information and widgets to display up front. It has got a three columns in the main area as well as in the footer area.

Minimalista – Another great port from WordPress to
Blogger.
Minyx 2.0 – A great template without pictures; good use of available space.

Pink Flower – A simple and elegant template with an image of, you guessed it, a pink flower.

Pizza – Don’t be dissuaded by the pizza theme if you are thinking of using this for a different subject blog. The template is highly customizable. The unique element in this template is the header which has been divided into two parts. You can display your blog logo or tittle on the left-side
header box while using the other box for whatever you like.
Pro – A different-look search box, menu links above the blog title, and the graduated blue
header background in a unique design makes this template unique.
Puerto – Somehow this template makes the post body look grand and majestic.

The Hobbit – If you are a fan of Tolkien, this one is for you.

Neo – A 3 column template that reloads in parts allowing faster reading and surfing.

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that’s so pro templates…….i really enjoy the layout.