Scratch

Booleans would be really good too, at the moment you have to use a variable, for example if variable 'walking' = 1 (true)
wait until walking = 0 (false)

if variable 'walking' = 0 (false)
set walking to 1
move 10 steps
set walking to 0

with a boolean it wouldbe

if walking is true
wait until walking is false
if walking is false
set walking to true
move 10 steps
set walking to false
That's a pretty weak example but it was just quick