Katta

Katta is is a search grid, built on top of Apache Hadoop, Lucene and Zookeeper. It serves very large indexes as index shards on many servers and replicates shards on different servers for performance and fault-tolerance. The master provides plug-able shard distribution schemas. The search client has plug able node selection schemas for selection low latency nodes. Both together easily allows to run Katta distributed over different racks, for example in a data center.
Questions? Contact Stefan Groschupf (sg AT 101tec.com).
http://sourceforge.net/projects/katta/

Webdav Servlet

A super lightweight implementation of the webdav protocol. Underlying data storage is made plug-able by implementing a single interface.
101tec coded this entire project and maintains it to this day.
Questions? Contact Andreas Küster (ak AT 101tec.com).
http://sourceforge.net/projects/webdav-servlet

Weta

The Weta-group is a collection of professional open source development tools and frameworks for distributed and grid computing. Different sub-projects are used to solve problems like distributed storage, job scheduling and large data processing.
Questions? Contact Johannes Zillmann (jz AT 101tec.com)
http://sourceforge.net/projects/weta

JMX Unit

JMX Unit is a simple extension of Junit. The tools support JMX vendor independent testing of JMX MBeans.
Questions? Contact Stefan Groschupf (sg AT 101tec.com)
http://sourceforge.net/projects/jmxunit

Thinglink

Thinglink is an initiative to build a free product code and an open database system for arbitrary objects, especially creative work. It is an Open Source project that is sponsored and developed by 101tec.
Questions? Contact Frank Henze (fh AT 101tec.com)
https://sourceforge.net/projects/thinglink

Contributions

Apache Nutch

Nutch is an open source web-search software that 101tec has contributed to in a number of ways. 101tec has helped fix numerous bugs, and made many improvement to Nutch, including the plug-in framework added in 2004. Today, there are more than 60 open source plug-ins, and many personal use and commercial plug-ins.
http://lucene.apache.org/nutch/

Apache Pig

101tec has contributed several bug fixes and improvement patches to the Apache Pig project.
http://incubator.apache.org/pig/

KaDoSu

KaDoSu indexes all documents in an archive and lets you search them in a variety of ways. It automatically categorizes the search results and allows for the user to manually categorize a document. It renders the search results visually and textually. It uses Eclipse RCP. 101tec contributed several improvements and bug fixes to the KaDoSu project.
http://sourceforge.net/projects/kadosu

Sonc.rb

Sonc.rb is a ruby script used to run programs after an inet device is used to establish a connection, and after the connection closes.
101tec contributed improvements and bug fixes to the Sonc.rb script.
http://infram.wordpress.com/soncrb-start-on-connect/

Tryregexp

A ruby and java program used to test regular expressions. Useful for testing match and substitution expressions for ruby and java languages, as both programs share the same gui.
101tec contributed improvements and bug fixes to the Tryregexp program.
http://infram.wordpress.com/tryregexp-test-regular-expressions/