"Fruit of the Spirit" is a biblical term that refers to the nine visible attributes of a true Christian life.
Paul sums up the 9 "fruits of the spirit" in Galations 5:22-26 "But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control. Against such things there is no law. Those who belong to Christ Jesus have crucified the sinful nature with its passions and desires. Since we live by the Spirit, let us keep in step with the Spirit. Let us not become conceited, provoking and envying each other."
You can find articles, podcasts, and videos about the fruit of the spirit from respected pastor's and speaker's on Jesus.org.