Keplr is a browser extension wallet designed to support the Cosmos Internet of Blockchains. You can use Keplr to store, send, or receive mainnet-BTSG tokens. You can also stake your BTSG tokens directly to a Validator on the BitSong mainnet from your Keplr wallet.
Leap is a non-custodial super wallet for web3. It is already live on Cosmos & Terra 2.0, while it is expected to be deployed soon on Avalanche too.
BitSong is integrated with full support into Leap Wallet Extension. In order to manage your $BTSGs via Leap Wallet you'll need to install Leap Wallet Web extension for Cosmos. Open a new wallet or import one via the available options and start managing your BTSGs on Leap Wallet.