Simplefolio is a great looking portfolio tumblr theme. It’s a great way to showcase your work.It also comes with the get in touch button so that anyone can contact you easily. The theme was designed by Pixelunion

This bright colored theme comes with the choice of 5 different color variations, blue, green, red, orange and purple, of the same theme for Tumblr.  This theme comes with a very rich side bar. The Theme also comes with the PSD files if you would like to go for color outside the 5 given.

Pixelated theme is a clean premium tumblr theme that focuses on details and supports all post types. The theme also comse with an “Ask me” feature which allows visitors to ask questions for you to reply to. Pixelated is a 2-column theme, it has a higly customizable sidebar which allows you to show author bio, [...]

Boxxed is a very colorful bright tumblr theme that uses transparency. The theme has twitter and flikr feeds on the side bar, the theme supports all post types.

Antiquity  is a very detailed  grunge based Tumblr theme colored with lovely light colors. Obox –  the makers of this theme have put extra attention to detail which is what makes this theme look so great.

Tumble News is a premium news style theme. The theme looks modern and has a great color palette.