Recently alphanet-node.tzscan.io has turned off. I'm looking for some public testnet nodes for development purpose
2 Answers
The Testnet formerly known as "Alphanet" is now called "Babylonnet".
Public node address:
Future Testnets will get the name of the actual protocol. More Infos here
The list of current testnets for the Tezos blockchain can be found at:
The platform also exposes RPC services.