Pura (PURA) digital assets seem to be currently inactive. Originally, the developers’ idea was to leverage anonymous and instant transaction through offering PURA coin. PURA is the project of the Dash team.
Dogecoin (DOGE) was founded in the US in 2013 as a joke but quickly gained a large following. It became a popular cryptocurrency (DOGE) used for tipping the content creators (mainly on Reddit and Telegram). As the creators had no serious plans for their currency they didn't elaborate a roadmap and were not working on the improvement of their project too much. The founder of Dogecoin Jackson Palmer left the project in 2015.