How can I use the Litecoin testnet? Is there any Litecoin testnet explorer which records Litecoin testnet transactions? Where can a Litecoin testnet wallet be downloaded? Any reference or step by step explanation would be much appreciated.
Download Litecoin Core, install it,  and start it with the -testnet option.

I'm aware of two Litecoin testnet explorers:


http://testnet.litecointools.com/
https://chain.so/testnet/ltc