Below you'll find a list of all of the casino bonuses out there that use Microgaming software, which is one of the most popular platforms out there. I've listed these by group whenever possible, along with info as to how many casinos in the group you're typically allowed to sign up for, etc.
As far as I know, nearly all of these have switched over to the new EZ/ClearPlay bonus system, which means they can all be +EV if played like a sticky bonus. I've noted the ones that don't use the EZ bonus system, as whether or not those are +EV or -EV depends on the actual promotional terms.
For more info on exactly what a "sticky" casino bonus is, hop over here: Strategy for Sticky Casino Bonuses.
32Red Casino Group
32Red Casino: up to $100 signup bonus plus $50 monthly match bonus (Doesn't use EZ system, can clear monthly with BJ)
Dash Casino: 100% up to 50 signup bonus (Uses QuickCash bonus system; bonuses are only +EV if played like a sticky)
WagerShare: These are cashable and allow BJ but only count it as 10% towards clearing the WR, which typically results in a WR of 150xB+D, which is obviously -EV. You can still play these like a sticky, though, or even a semi-sticky, if you grind out a lot of WR trying to sticky it up and can then clear the remaining WR profitably.
Pigg's: 40% up to $400
Mummy's Gold (currently offering a $500 free to wager with for an hour, letting you keep a maximum of $200 in profits)
Jackpots in a Flash: 100% up to $100
Spin Palace: 100% up to 150
Ruby Fortune: 100% up to $100
Grand Prive Group: All of these use the EZ/ClearPlay system and should be played like stickies.
Casino Grand Bay: 100% up to $250
BellaVegas: 100% up to $250
100% up to $250
Lake Palace: 100% up to $250
Fortune Lounge: These all now use the EZ bonus system and should be played like a sticky. They also sometimes will ban you from signing up at all of their casinos, especially if you signup at multiple ones in a short time span and/or cashout from one with a big profit, then hit another shortly thereafter, etc.
Vegas Villa: 30% up to $1000
Vegas Palms: 50% up to $200
7 Sultans Casino: 200% up to $200
Desert Dollar: 150% up to $150
Royal Vegas: 100% up to $100
Fortune Room Online Casino: 1000% up to $500
Vegas Towers: 100% up to $50
Platinum Play: 100% up to $100
Casino Rewards: These all now use the EZ bonus system and should be played like a sticky bonus to be +EV. This group is also hit or miss, as far as how many they let you sign up at within their group. Sometimes they cut people off after 1 or 2, sometimes they let you sign up for a few more.
Blackjack Ballroom Casino: 40% up to $400
Golden Tiger Casino: 50% up to $250 free
Yukon Gold Casino: 100% up to $50 free
Captain Cooks Casino: 1 free hour on the house
Strike it Lucky: 100% up to $20
Virtual City Casino: no deposit $10 free
Lucky Emperor: 100% up to $100
Zodiac Casino: $10 free, no deposit required
Casino Classic: 1 free hour on the house
Casino Kingdom: 100% up to $77
Phoenician Casino: up to $1,200 free
Aztec Riches: up to $850 free
Casino Profit Share: This group also uses the EZ bonus system, so these should be played like stickies.
Challenge Casino: up to $1,000 free
Music Hall Casino: up to $500 free
UK Casino Club: up to $125 free
Golden Reef Casino: up to $100 free
Nostalgia Casino: up to $200 free
iBig Casino: up to $100 free
Trident Share: These also use a version of the EZ bonus system, although BJ counts more here, so it makes these slightly less sticky. You should still play them as stickies initially, but you have a better chance of getting close to clearing the WR by trying to sticky your balance up, at which point you can profitably grind out the rest of the WR instead of cashing out and sacrificing the bonus.
King Neptune's Casino: 100% up to $200
Trident Lounge Casino: 100% up to $200
Vegas USA Casino: up to $50 free
Vegas Partner: These all use the EZ bonus now and should be played like stickies.
Crazy Vegas Casino: up to $100 free
Sun Vegas Casino: up to $60 free
Cinema Casino: up to $70 free
777Dragon: up to $100 free
Arthurian Casino: up to $75 free
Casino US: up to $350 free
Maple Casino: up to $60 free
Golden Riviera Casino: up to $200 free
River Nile Casino: up to $100 free
Miami Paradise Casino: up to $100 free
Slots Royale: up to $400 free
Jackpot Factory Group: These all use the EZ/ClearPlay system and should be played like stickies.
All Slots Casino
First Web Casino
Wild Jack Casino
BelleRock Gaming: These also use the EZ/ClearPlay bonus system, should be played like stickies, yada yada yada.
The Gaming Club
PlayerShare Group: EZ bonus system, should be played like a sticky.
CasinoShare: 100% up to $250
G3Partner: EZ bonus, should be played like a sticky.
Grand Monaco Casino: 100% up to $150
Roxy Group: EZ bonus, played like a sticky.
Big Dollar: EZ bonus, played like a sticky.
Big Dollar Casino: 100% up to $100
Casino Enterprises Ltd.: EZ bonus, should be played like a sticky.
Volcanic Gold Casino: up to 400 free
Pigg's Peak: up to 100 free
Thunderluck: EZ bonus, played like a sticky.
Vegas Slot Casino
Vegas Country Casino
Royal Plaza Casino
Vegas Joker Casino
Grand Hotel Casino