The Neo4j Heroku Challenge was a global contest where developers from various languages submitted their projects that utilized the Neo4j graph database. The overall winner, Flavorwocky, won the most votes among the Neo4j community and received a new iPad. Several language winners also received prizes, including $100 to ThinkGeek and recognition on Coderwall for their contributions. Additionally, all participants will receive Coderwall badges in recognition of their skills. The contest was organized by the Neo4j Community Team and Heroku, with the goal of encouraging community contributions and fostering a collaborative environment.