Coding

Beaver Achiever

BeeBots (online)

Bitsbox

Bot Logic

Blocks Jumper

Breakout EDU

Candy Quest

Code.org

Code Builder

Code Monkey

Code Monkey Jr.

Code Panda

Codespark

Coding Adventure

Compute It (by Toxicode)

Dodo Does Math

Draw in Code

Follow the Code

Kodable 

(select "play without saving" if you don't have an account)

Launchball

Little Dot Adventure

Moana

Run Marco

Scratch 

(through CSFirst)

Space Adventure

Sploder (video game design)

Think in code

Time to climb

Tynker