We took the data from Santiment’s 2019 Market Report. Projects are sorted by the average daily development activity in 2019 on the Github. The number of daily events is approximate.
Leaders are Cardano and Ethereum. Cardano team was preparing for the much-awaited Cardano Incentivized Shelley testnet – a big step towards network decentralization, testnet was succesfully launched on December, 13th. Ethereum team was pushing the updates for Ethereum 2.0, scheduled for 2020.