This is something I would like to know.
(Checking out how this Community works for asking questions like this.)
There are quite a number of tools to do delegation with.
I use @justyy's Delegation Tool...
Message me on Discord (Pennsif#9921) if you need any help with this.
Thanks for that, I didn't know it myself.
Personally, I used to use SteemWorld to delegate, undelegate or check my delegations (or anyone else's for that matter).
From SteemWorld --> Delegations Tab:
Currently, I prefer to use Steem Keychain directly.
Let me know if you need additional information or if you expected something else in the response.
There is also steembottracker.com. Piece of cake through it as well.
Yup, I used it too in the past for the delegation tool. Also very simple.
I love steemworld.org