Things Flip EQ is an easy-to-use tilting EQ plugin with mid/side mode. Turn the main knob to the right, and you get more highs and less lows; turn it to the left, and lows are boosted while highs are attenuated. You can choose the cutoff frequency of the EQ with the Cutoff control, or increase the gain of the EQ with the Boost button.
Things Flip EQ can also be applied to either the mid or side of a stereo signal to further enhance the stereo depth.