I recently tried the demo of Harmor and loved the fact I could drop a one shot from another synth into it and re-synthesise it. Specifically, being able to take a single sample and realistically play it within an octave of its original pitch without the sample duration changingis really handy. I don't have the money for Harmor and don't believe this is possible in either of the two synths I own (Synthmaster and Serum). Do you guys know of any free (or very cheap) plugins that allow me to do this? Cheers

You could do something similar and serum...and I guess any other VST that allows for customer wave tables. It wont be done quite the same way that Harmor does it but you can get a similar effect.