CacoFX has released ChordME, a free VSTi plug-in for Windows which converts incoming MIDI notes into full chords.
Different chords can be assigned to each note across the octave so that complex chord patterns can quickly be built up from simple MIDI lines.
ChordME can also transpose the generated chords up or down octaves independently from each other to help create realistic sounding chord progressions.
The chords can also be bypassed to allow just the original MIDI notes to be output and transposed if required.