Here are some of the best flash game developers in the industry:

 

_undefined - Casual games with commercial depth, Defender, Protector and many fresh ideas. 

 

Armor Games - Shift, Grid16, Sonny and other great games! 

 

C404 - The Classroom, Nuclear Eagle and others you have already played. 

Coming soon Stranded 2! 

 

Diverge -  Creators of the free online multiplayer game "HOST" and other edgy original games and content.

 

Ezone - Sling, Lenny Loosejocks and nearly 100 other great games! 

 

Evilfree Productions - Asteroids Revenge III, Sola Rola and an all around great guy!

 

FlipLine Studios - Papa Louie, Papa's Pizzeria and the upcoming Remnants of Skystone

 

GameInABottle -  creators of Treasure of Cutlass Reef and Ballon Invasion among other games.

 

Hero Interactive -  BubbleTanks, StormWinds, Starshine, LightSprites and many other top class games.

 

irRegularGames - Simple and elegant with great gameplay is the best way to describe Cirplosion and Sproing. 

 

PlayerForever.com - developer of Mafia Driver, ToyCar, MadPac and other first-class flash games. 

 

Psycho Goldfish - Generic Defense, Mini-Putt Online, Alloy: Arena and many other great games.