I've compiled a fairly comprehensive list of all that the Donkhouse has to offer, although more features are always on their way! Check out the feature request page to take part in deciding the Donkhouse's direction!
72 bounty: If a player wins with 72 (suited or unsuited) by folding out all other players or scooping the main pot at showdown, he or she collects the specified amount from each player at the table. If the hand involves multiple boards, the first board is used in determining bounty elegibility. If the game is short deck, the bounty is activated for J6. In games with more than two holdecards, a player must win with a non-paired 7 and a non-paired 2 in his or her hand.
Autocheck/fold: Ticking off this checkbox in-game will cause your cards to be automatically folded if putting money in the pot is required in order for you to stay in the hand once action advances to you. If you can simply check by the time it's your action, that action is completed for you.
Autostart: The default mode of play. Cards are automatically dealt to the first two players to sit in at a given table. Compare with manual start.
BigO: A variant of Omaha in which all players are dealt five cards instead of the usual four. Players must use exactly two of their holecards (and exactly three of the community cards) at showdown to make their best standard five-card poker hand. This game can be played for the high only or in a hi-lo format.
Bomb pots: If all players sitting in at the table vote for this election, everyone posts some customizable amount and the flop is immediately dealt.
Buy-in caps: A customizable maximum amount of chips with which a player is able to enter a game. Additionally, at the Donkhouse players can be limited to the maximum of this value and the largest stack at the table.
Buy-in requests: When enabled, players can top off their stacks only after getting approval from a group administrator. A prompt appears on each request, which admins can either approve or deny.
Checking in the Dark: If a player ticks the appropriate checkbox before action is completed on a given street, he or she will automatically check on the next street (provided either a. he or she is first to act or b. all players before him or her have also elected to check in the dark).
Dealer's choice: A style of poker where players take turns selecting the game mode (e.g. Texas Holdem, short deck, PLO). At the table, players indicate their preference via a drop-down menu and can change their selection at any point they like. A special button, the dealer's choice button, appears before the player whose preference is currently in effect. The Donkhouse supports several styles of play: the dealer's choice button can progress every hand (so that the dealer's choice button and the dealer button are one in the same), the dealer's choice button can move to the left every orbit less one hand, or the dealer's choice button can move to the right every orbit plus one hand.
Double boards: If everyone at the table ticks the appropriate checkbox before the start of a given hand, two versions of each street will be dealt from the same deck. At the end of the hand, the winner(s) of the first board collect one half of the pot, and the winner(s) of the second board collect the other half of the pot.
Email notifications: You can set in your profile just when and how often you'd like to be updated about the status of games in groups with which you're associated.
Four-tone decks: A customizable setting in your profile that determines whether decks are two-tone (i.e. red and black) or four-tone (i.e. each suit appears as its own color to introduce easy differentiability between the suits).
Ghost hands: After folding, your hand will be reincarnated for your eyes only with a slight amount of transparency. This feature is meant to enhance one's ability to quickly refer back to what he or she folded. Hover your cursor over the cards to decrease their transparency.
Irish Hi-Lo Omaha: A variant of hi-lo BigO where players can use either two OR three of their five holecards in conjunction with three or two of the community cards, respectively.
Large-pot timebank multiplier: A multiplier for the amount of time a player is given to act when the pot contains 500 B.B.s. By default, an 80-second allowance is adminstered in such a scenario. Allotted time increases logarithmically as a function of pot size from the zero-chip threshold governed by the small-pot timebank multiplier.
Manual start: An alternative mode of initiating games at the Donkhouse, set when creating a table. If selected, this feature will enable group administrators to start and pause the game as they see fit. Compare with autostart.
Rabbit hunting: If a hand ends before all community cards have been dealt, a player may request for the remaining cards to be revealed. A nice way to satisfy that degenerate urge to know what could have been.
Resolution: A measure of pixel density. To reduce load on your computer and/or conserve battery life, you may wish to lower resolution from your profile.
Running it twice: For each remaining street, two sets of the required cards are dealt. At the end of the hand, the pot is divided equally between the two runouts and distributed accordingly. All players involved in a given hand must have "run it twice" checked by the time action is completed in order for this feature to be activated.
Short deck: A variant of Texas Holdem in which all twos, threes, fours, and fives have been removed from the deck. Further, aces can be used to complete the low-end of straights beginning with a 6, and flushes beat full houses. Finally, action begins with a round of antes––the dealer button posting double the required amount.
Showdown timings: By default, players table their hands at a rate of one hand every two seconds. This value can be changed to whatever you'd like when creating a table.
Small-pot timebank multiplier: A multiplier for the amount of time a player is given to act when the pot is empty. By default, a 15-second allowance is administered in such a scenario. Allotted time increases logarithmically as a function of pot size until the threshold for the large-pot timebank multiplier is reached at 500 B.B.s.
Straddling: Placing an amount equal to double the big blind when positioned directly to the big blind's left. Straddles are not blind raises: a straddling player has the ability to act if his or her post goes unchallenged. At the Donkhouse, straddles can chain. That is, the player positioned two seats to the big blind's left can straddle the under-the-gun player's straddle and so on and so forth. The maximum number of straddles is set when creating a table.
Target FPS: The number of frames per second your computer attempts to render on the screen. To reduce load on your machine and/or conserve battery life, you may wish to lower this value from your profile.
Taunts: Type 't' followed by an integer to pour salt into the wounds of your beaten friends/enemies. We're always adding more, so be sure to type "-help" in the chat for an up-to-date list of available soundbytes. Also, if other players' taunts are getting on your nerves, mute them by typing "mute «username»". Perhaps unsurprisingly, you can always unmute these players with the "unmute «username»" command.