Contributions are an essential part of open source and what sustains us as a community. What is the next wave? How can we all participate, and how can open source projects and mentors prepare well to make the most of the opportunity?

John Dohoney and Kaitlin Carter walk you through deploying the SMACK stack on DC/OS. This architecture enables you to create modern streaming applications that make use of NoSQL databases with Cassandra and message streaming with Apache Kafka using analytics streaming with Apache Spark, all running under Apache Mesos implemented with Akka streaming and asynchronous Java libraries under DC/OS.

Hyperledger was formed with the vision of establishing a community that brings together the smartest minds to solve the challenges of delivering blockchain technology for the enterprise. Christopher Ferris explains how Hyperledger's "greenhouse" is not only incubating new technologies but also entering into the collaboration and consolidation phase.

Conventional wisdom says building a type system goes hand in hand with building a language. What happens when you go against convention? Well, for a language with millions of users like JavaScript, it turns out that your type system has to be pretty expressive. Daniel Rosenwasser explains how TypeScript has grown to meet JavaScript code and why it's one of the fastest growing languages today.

Cloud Foundrya multicloud, IaaS-agnostic platform as a service with an active open source communityalready has solutions for ingress routing for both HTTP and TCP traffic. Shubha Anjur Tupil and Aaron Hurley share a case study in which their company augmented its routing tier using Istio and Envoy. Join in to hear about the journey and the lessons learned along the way.

Community is an integral part of the success of any open source project. OpenLab is an open source community lab program that gives developers and users access anywhere, at any time. Melvin Hillsman offers an overview of OpenLab, shares how OpenLab is helping to build a vibrant app ecosystem for the cloud, and explains how you can leverage and participate in the program that lets everybody play.

Challenges are what make life interesting. WebOS OSE is what makes development meaningful. Joseph Park, Steve Lemke, and Lokesh Kumar Goel offer an overview of webOS Open Source Edition and explain how to use webOS OSE to create and use apps and services with Enact and Luna. Join in to see how you can get started contributing to the project.

Sentiment analysis can reveal how people are truly responding to a product, service, or social issue. Pierre DeBois demonstrates how to conduct a sentiment analysis in R programming using Twitter.