
The Roku Channel store is pretty awesome. They have channels neatly organized by many categories.
One of our favorite ways to search for new public Roku channels is in the New and Notable category from a web browser. They list many of the newer public channels there and you can add them right to your Roku.
Roku also has Private Channels which must be added by a vanity code. These codes are often shared by channel developers to let users test out channels before they are made public. And some channels like Adult Roku channels are not allowed to be made public at all.

Here is a long list of Roku private channel codes, along with instructions for adding them to your Roku. These private channels cover a lot of different stuff and while are all guaranteed to work. Spend some time digging through this list you may find several pretty nice Roku channels you won't find listed in the Roku Channel store.
View The Full Roku Private Channels Codes List Here