MB-PlugIns has released version 0.9 of MB Stereoizer, a simple plug-in that uses a modulated delay and amplitude modulation to create a stereo signal from a mono input. This could be useful if you want to double a vocal track or a synth line; it can also be used on a stereo input to enhance/spread the stereo base even more. When the output is set to mono, it creates a chorus/flanger-like sound.
MB Stereoizer enables you to swap channels, phase invert, mono-ize the input or monitor the signal without modifying it in any way.
MB Stereoizer is free and is available as a VST effect plug-in for Windows.