The ASF is made up of over 100 top level projects that 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.
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.
The Apache Tika toolkit detects and extracts metadata and structured text content from various documents using existing parser libraries.
The Apache Tika toolkit is an ASFv2 licensed open source tool for extracting information from digital documents. Tika allows search engines, content management systems and other applications that work with various kinds of digital documents to easily detect and extract metadata and content from all major file formats.
Tools and infrastructure for the template engine
VelocityTools is a collection of Velocity subprojects with a common goal of creating tools and infrastructure for building both web and non-web applications using the Velocity template engine.