Apache Spark - A unified analytics engine for large-scale data processing

CMAK is a tool for managing Apache Kafka clusters

A fault tolerant, protocol-agnostic RPC system

Snowflake is a network service for generating unique ID numbers at high scale with some simple guarantees.

Principled Functional Programming in Scala

Fault tolerant job scheduler for Mesos which handles dependencies and ISO8601 based schedules

Deploy and manage containers (including Docker) on top of Apache Mesos at scale.

A Scala API for Cascading

[Archived] A flexible sharding framework for creating eventually-consistent distributed datastores

Apache Spark to Apache Cassandra connector

Development in Shark has been ended.

Purely functional JSON parser and library in scala.

Scala source code formatter

on-the-fly-schema Migration tool for MongoDB

Hipchat with akka.