The ASF @ 15 - The Apache Software Foundation Celebrates 15 Years of Open Source Innovation and Community Leadership http://s.apache.org/wZr
... and cheered at ApacheCon Europe http://s.apache.org/1o4
The ASF is made up of more than 150 top level projects which cover a wide range of technologies. Chances are if you are looking for a rewarding experience in Open Source, you are going to find it here.
ActiveMQ is the most popular and powerful open source Message Broker.
ActiveMQ is a fast and powerful Message Broker which supports many Cross Language Clients and Protocols and many advanced features while fully supporting JMS 1.1 and J2EE 1.4.
Apache Phoenix takes a NoSQL key/value store such as Apache HBase and turns it into a SQL database.
Apache Phoenix is a SQL query engine for accessing NoSQL datastores such as Apache HBase. It is accessed as a JDBC driver and enables querying, updating, and managing NoSQL tables through standard SQL. Instead of using map-reduce, Apache Phoenix compiles your SQL query into a series of HBase scans and orchestrates the running of those scans to produce regular JDBC result sets. Direct use of the HBase API, along with coprocessors and custom filters, results in performance on the order of milliseconds for small queries, or seconds for tens of millions of rows.
Simple encoders and decoders
The codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.