(Taken from this post in the ENWorld forum thread)

Here are the skills from the d20 SRD and their Microlite20 equivalents:

Appraise - com+MIND
Balance - phys+DEX
Bluff - com+MIND
Climb - phys+DEX or STR, whichever is highest
Concentration - doesn’t apply. GM’s fiat applies
Craft - it’s an out of game thing. No one ever crafts things in-game, so it’s a redundant skill. Alternatively, know+DEX
Decipher Script - know+MIND or com+MIND
Diplomacy - com+MIND
Disable Device - sub+MIND or sub+DEX
Disguise - sub+MIND
Escape Artist - sub+DEX or sub+STR, depending on what you’re escaping out of
Forgery - com+DEX
Gather Information - com+MIND
Handle Animal - com+MIND or com+STR if the animal is bigger than you
Heal - know+MIND
Hide - sub+DEX
Intimidate - could be phys+STR, or sub+MIND or com+STR. You choose
Jump - phys+STR (long jump) or phys+DEX (high jump)
Knowledge - know+MIND
Listen - sub+MIND
Move Silently - sub+DEX
Open Lock - sub+DEX
Perform - com+MIND, though it could be DEX if you’re juggling, or STR if you’re a weightlifter
Profession - com+MIND, usually
Ride - com+DEX
Search - sub+MIND
Sense Motive - com+MIND
Sleight of Hand - sub+DEX
Speak Language - doesn’t apply. You either know the language or you don’t. Alternatively, com+MIND to understand subtle nuances, I guess
Spellcraft - MIND only
Spot - sub+MIND
Survival - phys+STR to survive, or sub+DEX or STR to hunt stuff.
Swim - phys+STR
Tumble - phys+DEX
Use Magic Device - you can either use it, or you can’t. GM fiat. Alternatively, MIND only
Use Rope - no, never ever. Use Rope is a DEAD SKILL. This skill is dead. It has passed the mortal coil (of rope). Use phys+DEX if you must, but don’t say I didn’t warn you.