| Operating Systems | Linux : (Debian 5 onwards, Ubuntu 8.10 onwards, Ubuntu Server 10.04,12.04, 14.04 UE2.2/2.6/2.8, Fedora 11-20 RHEL 6/7, Cent OS 5.5 onwards), Mac: (Lion onwards) |
| Programming Languages | Java, Python, C, Dr. Scheme |
| Scripting Language | Shell Scripting, JavaScript |
| Markup Language | HTML, XML |
| Query Language | MySql, Oracle 10g |
| Big Data and Analytics | Apache Hadoop, HDFS, MapReduce, Pig, Hive, HBase, Sqoop, Flume, Hortonworks Sandbox, Lucene, Lucene Facet Search, Solr |
| Tools | Docker, Docker Swarm, Plone/Zope, LDAP, Trac, SVN, LaTex, WIKI, Eclipse Galileo, VI Editor, Emacs, Mailman, Samba, Bluefish, LibreOffice3.0, Grass (GIS Software), OPENSHIFT |
| Webserver | Apache2, nginx, Apache-Tomcat 5.5/6.x/7.x/8.x, Zope, JBoss, Glassfish 3.0 |
| Web application Technologies | Struts2, Hibernate, JDBC, JSP, Servlets, Tiles, AngularJS, Bootstrap, CSS, Ajax, YUI, DOJO, JSON | Image Processing Libraries | OpenCV, TBB, DS9, Tessarect |
| OpenSource Libraries | OpenLDAP, Apache Tika, vmtouch, udev, Exiftool, Unoconv, Aubio, FFMPEG, FFMBC, MXFLib, videodumper |
| Build Tools | Unix MAKE, Apache Ant, Maven, Debian Packaging, Python Packaging |
| Networking Setup |