After the FLOP , the Possibilties are : 

1) TOP Pair ( favourable if you had a  high pocket card )

2) MIDDLE Pair

3) BOTTOM Pair

4) TWO pair ( a FULL House draw )

5) Three of a kind ( favourable if you had a pocket pair )

6) STRAIGHT draw ( favourable if you have connectors ) 

7) FLUSH draw ( favourable if you had high suited pocket cards )

NOTHING ( favourable if you have strong pocket cards but the board is not textured )