A wallet and set of tools for Stellar - a more user-friendly version of the Stellar Laboratory (be sure to only use with a hardware wallet or sign transactions offline).
As one of our favorite web wallets here at Lumenauts.com, MyStellar.Tools makes performing operations on the network very easy.
Please keep in mind that by entering your secret key on a web wallet, you are exposing yourself to the risk of a BlackWallet-esque attack. This is not a problem with this specific web wallet, but with web wallets in general. If you input a secret key on any web wallet (which we don't recommend doing), use your hot wallet.
To increase security, MyStellar.Tools offers a Ledger sign in option. It also provides an option to just "sign in" with your public key, create a transaction, copy the transaction hash and envelope (XDR), sign the transaction offline, then return to submit the transaction. If you use a hardware wallet or sign a transaction offline in a different way, be sure to quadruple check the transaction only contains the operations and destination accounts that you designated.