Here's a list of console commands and what they do.
fraglimit: It now works as the capture limit. Frags are completely ignored.
scratch1: Set to '1' if you want to play TF vs DM mode. Default is '0'.
temp1: When set to '1', visible weapons will be active. Default is '0'.
saved1: Makes N Blue bots to connect automatically on the next level. Default is '0'.
saved2: Makes N Red bots to connect automatically on the next level. Default is '0'.
saved3: When set to '1', Tech powerups will be available. Default is '0'.
savedgamecfg: When set to '1', it will use the QW "skin" command, to make the class skins visible on QW servers. Let this off on NQ servers. Default is '0'.
impulse 9: Selects '9' weapon.
impulse 10: Selects your grenade.
impulse 15: Prints your origin.
impulse 20-96: Spawn waypoints 1 to 77. More info on WAYPOINT EDITING.
impulse 97: Removes the nearest waypoint.
impulse 98: prints all waypoints (for waypointing new maps).
impulse 101: Spawns a blue bot.
impulse 102: Spawns a red bot.
impulse 103: Kicks a blue bot.
impulse 104: Kicks a red bot.
impulse 105: Kicks all bots at once.
impulse 160: This merely toggles if you want your gl_polyblend be set to zero or not after your blindness caused by a flash grenade is healed.
changeteam: Change team. You die and respawn as the opposing team, as the same class. You don't lose a frag when doing this.
detpipe: Detonates your pipebombs.
scanner: Turn proximity sensor on or off.
chaingun: Spin up/spin down your chaingun.
lasersight: Toggle laser sight.
build: Enter build menu.
disguise: Enter disguise menu.
undisguise: Removes your disguise.
forcefield: Toggle force field on/off.
levitate: Toggle levitation on/off.
det5: Set a detpack for 5 seconds.
det20: Set a detpack for 20 seconds.
det50: Set a detpack for 50 seconds.
det255: Set a detpack for 255 seconds.
scout: Respawn as a Scout.
sniper: Respawn as a Sniper.
soldier: Respawn as a Soldier.
demoman: Respawn as a Demoman.
medic: Respawn as a Medic.
hwguy or heavy: Respawn as a Heavy.
pyro: Respawn as a Pyro.
engineer: Respawn as an Engineer.
psychic: Respawn as a Psychic.
saveme: MEDIC!
droptech: Drops your current Tech powerup.
dropflag: Drops the flag(if you're carrying it).