Apache DirectMemory

Apache DirectMemory is a multi layered cache implementation featuring off-heap memory management (a-la BigMemory) to enable efficient handling of a large number of java objects without affecting jvm garbage collection performance

Shark (Hive on Spark)

Shark is a large-scale data warehouse system for Spark designed to be compatible with Apache Hive. It can answer Hive QL queries up to 30 times faster than Hive without modification to the existing data nor queries. Shark supports Hive's query language, metastore, serialization formats, and user-defined functions.

Storm distributed compute grid

Storm is a distributed realtime computation system. Similar to how Hadoop provides a set of general primitives for doing batch processing, Storm provides a set of general primitives for doing realtime computation. Storm is simple, can be used with any programming language, and is a lot of fun to use!

jOOQ SQL in Java

jOOQ stands for Java Object Oriented Querying. It combines these essential features:

• Code Generation: jOOQ generates a simple Java representation of your database schema. Every table, view, stored procedure, enum, UDT is a class.
• Active records: jOOQ implements an easy-to-use active record pattern. It is NOT an OR-mapper, but provides a 1:1 mapping between tables/views and classes. Between columns and members.
• Typesafe SQL: jOOQ allows for writing compile-time typesafe querying using its built-in fluent API.
• SQL standard: jOOQ supports all standard SQL language features including the more complex UNION's, nested SELECTs, joins, aliasing
• Vendor-specific feature support: jOOQ encourages the use of vendor-specific extensions such as stored procedures, UDT's and ARRAY's, recursive queries, and many more.

Mosh roaming shell

Mosh is a remote terminal application that allows roaming, supports intermittent connectivity, and provides intelligent local echo and line editing of user keystrokes. Mosh is a replacement for SSH. It's more robust and responsive, especially over Wi-Fi, cellular, and long-distance links.
Mosh is free software, available for GNU/Linux, FreeBSD, and Mac OS X.

Cassovary: Twitter's graph processing library

Cassovary is a simple "big graph" processing library for the JVM. Most JVM-hosted graph libraries are flexible but not space efficient. Cassovary is designed from the ground up to first be able to efficiently handle graphs with billions of nodes and edges. A typical example usage is to do large scale graph mining and analysis of a big network. Cassovary is written in Scala and can be used with any JVM-hosted language. It comes with some common data structures and algorithms.

vert.x

vert.x is a high-performance distributed server stack based on Netty and Hazelcast.