WordNet sense 1 (having succeeded or being marked by a favorable outcome):

successful

WordNet sense 2 (having the ability to produce or originate):

generative

WordNet sense 3 (very productive):

rich

WordNet sense 4 (productive of profit):

fruitful, profitable

WordNet sense 5 (intellectually productive):

fecund, fertile, prolific

WordNet sense 6 (marked by great fruitfulness):

fat