Try my extended just intonation ("microtonal", for fans of that misnomer) sequencer capable of extended just intonation tunings, not restricted in any way by a scale or set of pitches.

Based on the theory of Harry Partch, and by extension those of Ptolemy, Eratosthenes, Pitagoras, Mersenne, Galilei, and especially Adriaan Fokker. Notes are represented as frequency ratios, there is only one space for all voices' notes, and 1/1 can be updated to reflect any note at any time. Partch would have winced to see me call them "notes", but he's dead. Dead men don't wince.

My compositions.