I have been working on implementing Leapfrog or Velocity Verlet integration for a while now and I have finally figured out how to implement it correctly. This enhances the overall physics quality and stability.
Now planets can have stable moons, fluids are much more stable and solids break in more realistic ways!
I also managed to slightly optimize the performance.
Changelog:
New Velocity Verlet Integrator
Stable orbits thanks to better energy conservation
More stable fluids simulation. Better incompressibility
Solids can be formed only by triangles now. No more strands of particles
Reworked collision detection
Added new "Random Mass Multiplier" slider
Added new presets
Set fluid "Delta" slider to 19000 by default
This new update breaks any save prior to this version.
I have also uploaded a new video to youtube showcasing the new features: