SF&F system?

[Turanil]

Not just the serial numbers but EVERYTHING relating to and associating with Star Wars must be removed.

Assuming you're publishing and distributing your material, the closest to the Force system is the skill-n-feat Psychic System found in The Psychic's Handbook. It's also Open Game Content (used with the OGL).

To be honest with you, I'd rather you put that book away, locked up in a chest or a safe, so you won't be influenced nor referenced from that book which is copyrighted material, in designing your game.

But if this is for your own personal gaming use, do what you want with it.

You are right. But from the beginning I try to be compliant with OGL. For example there is no feat drawn from d20SW. However, there is more than 200 feats drawn from d20 Modern and various other sources. It's enough I think. What I mean with tid-bits of d20SW or d20CoC are things reminding of that, no more. For example, there is an Energy-blade weapon with relevant feats to learn it. Everyone will see it is inspired by lightsabers, but it is done differently. As for d20CoC, it's more of an ambiance, not material picked-up in the rulebook. For example spells are dealt with in a much similar way, but I use only OGC spells, none of cthlhu d20 spells.