tyFlow and Krakatoa/Frost are all compatible.
To get Frost to import a tyFlow as particles: enabled the particle interface in the tyFlow.
To get Krakatoa to render tyFlow: enable geo rendering in Krakatoa, turn *off* the particle interface in tyFlow, assign a Mesh operator to the events you want to render and set the mode to "vertex cloud".
To export to PRT: put an Export Particles operator in the events you want to export (or place it in its own event if you want it to export all particles) and set mode to PRT.
To get Frost to import a tyFlow as particles: enabled the particle interface in the tyFlow.
To get Krakatoa to render tyFlow: enable geo rendering in Krakatoa, turn *off* the particle interface in tyFlow, assign a Mesh operator to the events you want to render and set the mode to "vertex cloud".
To export to PRT: put an Export Particles operator in the events you want to export (or place it in its own event if you want it to export all particles) and set mode to PRT.