Designing your own WordPress theme can be a daunting task for any non techie blog owner or non-designers etc. I have put together this small list of available WordPress themes.

http://www.kaushalsheth.com/themes

http://themes.wordpress.net/

http://www.templatemonster.com/category/wordpress-themes/ (paid for templates)

http://beccary.com/goodies/wordpress-themes/

This one

Some are duplicated but a good selection overall.

Related posts:

1. Quick tip about wordpress default themes
2. Fatal error message when clicking one click update in Wordpress
3. Free website templates
4. Fancy Some Cache?
5. 7 free fonts