This is kind of exciting for me, because I've always wanted to use Tumblr but I never felt comfortable with the way my blog looked. Not only that, but as a front end developer I really felt bad about not developing my own theme. Way back in the day I remember being intimidated by Tumblr and thinking that developing a theme would be extremely difficult. Turns out it's super easy!
I wanted my tumblelog to have the exact same look and feel as my blog, so I created Cactus for Tumblr. If you want to take a look at the credits and see the code, head on over to the tumblr-cactus GitHub repo.