Some of the commands you can use and their explanations (note: some commands DO NOT require the '!' before them!):
first - If you're the FIRST in the chat to type FIRST you get VIP for the stream!
!bop @USERNAME - to bop another user
!so @USERNAME - to shout out a fellow streamer
!clippo - to create a quick 1 minute long clip from the time you entered the command
!bits - to list the bit rewards in chat
!death [insert reason for death] - Will save Fred's most recent death to the death list, which you can recall from...
!memories - OR - !memories [number] - to recall either a random or specific death memory
!deaths - just to rub it in!
!lurk - chuck a lurk
69 - could be N I C E, could be... not nice.
bigbrain - for when Fred is being a big brain
smolbrain - for when Fred is not being a big brain
rainbow - just a sweet little rainbow
applause - when you need a little audience to cheer on stream
!pun - when someone pulls off a really bad (or really good) pun in the chat, just alert everyone!
!richkids - https://www.youtube.com/watch?v=3qTYO7idTDc
!rules - Dem's da rules
!sounds - List the sounds available for the "Play a sound" channel point redemption
!videos - List the videos available for the "Videos" channel point redemption
!honeybunstudio - to find out more about Mrs Fred
!tip - OR - !kofi - to find out how to tip Fred
!piccy - Some information on how to properly use the "Take a piccy" redemption
!song - to find out what's currently playing
!discord - to join the Scatterbrain Collective
!youtube - to check out the Youtube and become a Subscriber
!prime - any primers in chat?
!socials - for some social feeds
!weather - Fred's current weather
!exercise - A comprehensive list of all the exercises Fred has (and hasn't) done
!meme - get the link for submitting a meme for the Memeception redeem
!punchgreen - get the link for submitting a green screen video of yourself punching for Fred's punching bag event
!modcheck - are you a mod? Find out!
!fc - Fred's Switch friend code
!screens - Let Fred know you can't see what he's seeing
!honks - How many honks you have. You can't really use THESE honks yet, so use the StreamElements !points command for now