$

constrains associativity. It kind of says "execute everything on the right first." E.g.:
sum $ filter even [1..100] is equivalent to
sum (filter even [1..100]) .

<$>

is the same as liftA{n}

<*>

is the same as ApplicativeDo

^.

is the same as view

^..

is the same as toListOf

%~

is the same as over

.~

is the same as set
