FlashPlayer Obituary (RIP)

The Yuyu (and the series it's from)
 https://www.youtube.com/watch?v=finxSTIYezI
The Composer
 https://www.newgrounds.com/portal/view/400974
Paladin (the whole series, 100% gold)
 https://www.youtube.com/watch?v=n--speROZ6s
Rise of the Mushroom Kingdom (mario feels deeper than you expect, prepare your eyeballs)
 https://www.newgrounds.com/portal/view/113889
Ego City (Imagine Invader-Zim mixed with DBZ)
 https://www.newgrounds.com/portal/view/162892
The Madness Series ( there's a lot )
 https://www.newgrounds.com/portal/view/58182
The Race ++
 https://www.newgrounds.com/portal/view/170614
The Ultimate Showdown
 https://www.newgrounds.com/portal/view/285267
Salad Fingers (creepy more than funny, the novelty was funny to us)
 https://www.youtube.com/watch?v=M3iOROuTuMA
BlockHead
 https://www.youtube.com/watch?v=ND51GCcOSfc
The Decline of Video Gaming (series, all great)
 https://www.newgrounds.com/portal/view/158631
The Matrix has you (series, all great)
 https://www.newgrounds.com/portal/view/158218
Unforgotten Realms (narrative series, really funny)
 https://www.newgrounds.com/collection/unforgottenrealms
Arfenhouse (there are no words, kinda like a dumber Aqua Teen Hunger Force)
 https://www.newgrounds.com/portal/view/63227
Retarded Animal Babies (oh lord, don't subject yourself to this)
 https://www.newgrounds.com/portal/view/92330
Interactive Buddy (kids... this was HUGE)
 https://www.addictinggames.com/funny/interactive-buddy
Sonny (feels, great animation, a story, there's a sequel)
 https://www.newgrounds.com/portal/view/417513
Madness Interactive
 https://www.newgrounds.com/portal/view/118826
Max Dirtbike
 https://www.addictinggames.com/car/max-dirt-bike
There were also sites like StickDeath.com
 https://www.youtube.com/watch?v=9dfk9aCeuPA
and the XiaoXiao series
 http://www.stickpage.com/xiaoxiaoseries.shtml
and if we're talking about stick animations we can't forget the legendary Joe Zombie series
 https://www.newgrounds.com/collection/joezombie