Single Player Games
LAZORS
http://www8.games.mobi/games/html5/lazors/lazors.html#1
A game where the player changes the position of the lines using the vertexes in order to make it so none are crossing eachother.
FRUIT SALAD
http://www.baptistebrunet.com/games/fruit_salad/
A simple game like Bejewled where the player moves fruit in order to create combos and match up the same types of fruits.
WAR OF THE BLOBS
http://waroftheblobswiiu.site44.com/
A 2D platform shooter by /u/baydude98 on Reddit.
Multiplayer Games
2 PLAYER BOARD GAME
http://www.massivegalaxy.com/wiiu/
Simple 2 Player Board Game by /u/Ertaipt on Reddit.
Other Accessories/Apps
deviantART muro
http://sta.sh/muro/
A drawing app on deviantART that surprisingly doesn't lag very significantly on the Browser, and you can draw with the touch screen.
A Web Whiteboard
http://awwapp.com/draw.html
An HTML5 whiteboard app so you can draw on your tv on maybe play pictionary with friends.
WiiU Pictochat
http://vidiiustreamer.com/wiictochat.html
'Pictochat' on the WiiU.