Code point list for common characters which normally require shift to type:
For all: hold alt (not sure if altgr works), type the number shown on numpad

33 = !
34 = "
35 = #
36 = $
37 = %
38 = &
40 = (
41 = )
58 = :
60 = <
62 = >
63 = ?
64 = @
94 = ^
95 = _
123 = {
124 = |
125 = }
126 = ~