On the one hand Spohn & Burkhardt offers more complex handles with individually selectable actuators. Users can chose between flat or protruding pushbuttons and a wide variety of toggle switches. Also thumb wheels or rotary wheels can be integrated into the handles (see UG series, G25 and G9 grips). Even buttons with LED or dead man's function are an option. If desired, a relieving hand support can be built on.
If you wish to opt for a simpler version, there is a vast choice of toned-down handles with or without buttons. Ball and T-handles, for instance, fit comfortably in your hand. Handles for mechanical locking are also an option.