Enable Your Console: Then press the "~" key to bring up the console where you can type commands:

Normal Players
Command Use Chat Shortcut
sm_rank shows the rank of a player (money,time)
sm_tracers toggles the tracers for the player /tracers
sm_switch switches the cop status of a player (temporary - if too many cops online) /switch
sm_items shows the item menu /items
sm_dropmoney drops a specified amount of money as a suitcase /dropmoney
sm_gender sets your gender as male or female /gender
sm_stock if you have a stock(vendor) it will be displayed /stock
sm_model allows you to change default player models /model
sm_kickdoor if cop and have a warrant; kicks down a locked door if it has no keys /kickdoor
sm_push pushes a player /push
+roflcopter if you have a copter enabled; flys up  
-roflcopter if you have a copter enabled; flys down
sm_call calls another player /call
sm_answer answers a call /answer
sm_hangup ends a call /hangup
sm_casinocommands displays player casino commands in console /casinocommands
sm_mycasinos displays your owned casinos in console /mycasinos
sm_opencasino if you own a casino; opens it /opencasino
sm_closecasino if you own a casino; closes it /closecasino
sm_givecasinomoney if you own a casino; puts money into it /givecasinomoney
sm_takecasinomoney if you own a casino; takes money from it /takecasinomoney
sm_maxbet if you own a casino; set a maxbet allowed /maxbet
sm_bettypes displays all the different types of allowed bets /bettypes
sm_bet player can bet in a casino /bet
sm_job Lets a player set a custom job if they are a citizen /job
sm_hudcolor Lets a player choose a custom HUD color /hudcolor
  Teleports you out of the AFK room /exitafk
  Turns a firefighters watergun on /watergunon
  Turns a firefighters watergun off /watergunoff
  Disposes a bomb after it has been diffused (Firefighter Only) /dispose
  Diffuses a bomb before it goes off(Firefighter Only) /diffuse
  Toggles your HUD from being centerd up-top, on the left, or hidden /mainhud
  Toggles the center HUD on/off /centerhud

 

Admin Only
Command Use
sm_help displays sourcemod commands available and their descriptions
sm_admin displays the sourcemod admin menu