Some in-game feats and force skills without D20 counterparts. These will need converting to work:

Feats

(for more details, check the Game Banshee page)

Flurry (Improved, Master): Allows for an extra melee attack per round at a -4, -2, or -1 to attack rolls and defense (defense suffers for 3 seconds afterwards, as well.).
Conversion: Since the actual effect is redundant, maybe make it a feat that improves the attack bonus of extra melee attacks (perhaps by +1).

Conditioning (Improved, Master): Gives a +1 bonus to all Saving Throws per the respective feat level.

Dueling (Improved, Master): Gives a +1 to Defense and Attack Rolls when using a single one-handed weapon, melee or ranged, per feat level.

Force Feats

(for more details, check the Game Banshee page)

Force Aura* - User gains +2 Defense and +2 Saving Throws for 20 seconds.

Force Shield* - User gains +4 Defense and +4 Saving Throws for 20 seconds.

Force Armor* - User gains +6 Defense and +6 Saving Throws for 20 seconds.

Force Valor* - All Physical Attributes are increased by 2 for 20 seconds.

Knight Valor* - All Physical Attributes are increased by 4 for 20 seconds.

Master Valor* - All Physical Attributes are increased by 6 for 20 seconds.

Stun - Stuns enemy for 9 seconds. Fortitude save of 5 + User's Level + Wisdom and Charisma Modifiers. A successful save results in Slow for the duration. Does not effect Droids.

Stasis - Enemy cannot move for 12 seconds. Fortitude save of 5 + User's Level + Wisdom and Charisma Modifiers. A Successful save results in Slow for the duration. Does not effect Droids.

Stasis Field - Enemy and all enemies within 10 meters cannot move for 12 seconds. Fortitude save of 5 + User's Level+ Wisdom and Charisma Modifiers. A Successful save results in Slow for the duration. Does not effect Droids.

Stun Droid - Stuns Droid for 12 seconds. Droid receives damage equal to users level. Fortitude save of 5 + User's Level + Wisdom and Charisma Modifiers negates Stun and reduces damage by half.

Disable Droid - Shuts down all Droids within 5 meters of target Droid for 12 seconds. Droids receive damage equivalent to user's level. Fortitude save of 5 + User's Level + Wisdom and Charisma Modifiers negates the Stun and reduce damage by half.

Destroy Droid - Disables all Droids within 6 meters of target for 12 seconds and deals 1d6 points of damage per user level. Fortitude save of 5 + User's Level + Wisdom and Charisma Modifiers results in half damage.

Slow - Target moves at a quarter of their normal movement and suffers from -2 Defense, Reflex saves, and attack rolls for 30 seconds. Will save of 5 + User's level + Wisdom and Charisma Modifiers results in no effect. Does not effect Droids.

Affliction - Target 7 Phsyical Attribute points over 21 seconds at 1 point per 3 seconds. Target is also slowed. Fortitude save of 20 negates.

Plague* - Target becomes poisoned for 12 seconds. For each second while posioned they loose 1 point to each Physical Attribute for a total of 12. Target is also slowed. Fortitude save of 100 negates. Does not effect droids.

Force Storm* - All enemies within 10 meters of the user takes 1d6 damage per user level, to a max of 10d6. Will save of 5 + User's level + Wisdom and Charisma Modifiers halves damage.
Conversion: Feat that increases damage of Force Lightning

Force suppression, Breach - Not essential powers, but useful if you're up against difficult dark Jedi. These give you force based bonuses. Only 1 character can perfect them, and the armor restriction is a bind because it merely removes an enemies force valor or master speed powers.