Apache ActiveMQ: Open source messaging server, used to relay messages between components of the open smart grid platform. ActiveMQ is an open source message broker written in Java and a full Java Message Service (JMS) client. It provides "Enterprise Features" which in this case means fostering the communication from more than one client or server.
Apache Tomcat: Provides a "pure Java" servlet container for Java code to run in.
pgAdmin-III: PostgreSQL administration and management tools.
Protobuf (Google Protocol Buffers): A language-neutral, platform-neutral, extensible way of serializing structured data for use in communications protocols, data storage, and more.
Flyway: Agile database migration framework for Java
Spring: Application development framework. Several Spring libraries are used, including Spring Data, Spring Security and Spring WS.
Puppet: Application for Automatically delivering, operating and securing your infrastructure
Development
Bower: Package manager for Javascript packages. Web applications consist of various components; frameworks, libraries, assets, utilities, and rainbows. Bower manages all these things for you.