If you want to create tumblr like website through wordpress CMS. So, this Themeforest theme called Fast Blog is the solution. A good functionality is that you can post using the mobile phone by using a wordpress plugin called WooTumblog plugin.
Additional functionality to add pagination in the posts.
Lot of new social media icons available.
Fancy box ability for youtube videos.
Can be used with latest wordpress version.
Also include the document of how to use this theme.
Get this theme now: