Programming languages

  • C
  • C++
  • Objective-C
  • PHP 7
  • JavaScript + jQuery
  • HTML5
  • CSS3
  • GLSL
  • Perl
  • Java
  • Processing.js
  • TeX
  • Graphviz
  • Quartz Composer
  • Vuo

Web frameworks

  • Drupal 5, 6, 7, and 8 (including Composer, Twig, and Symfony)
  • Wordpress
  • Phabricator

App frameworks

  • Qt (using Qt Creator)
  • Cocoa (macOS, using Xcode)
  • Cocoa Touch (iOS, using Xcode)
  • LLVM
  • OpenGL
  • Android SDK

Databases and other server software

  • MySQL + MariaDB
  • PostgreSQL
  • Microsoft SQL Server
  • Windows Domain + Active Directory
  • Apache HTTPD
  • Apache Solr
  • Puppet
  • Docker
  • Elasticsearch + Logstash + Kibana (ELK)
  • Red Hat Enterprise Linux + CentOS
  • SmartOS + Illumos + OpenSolaris
  • CAS SSO
  • LDAP
  • Postfix (SMTP)
  • Dovecot (IMAP)

Web services

  • Xero
  • OAuth
  • Amazon S3
  • Amazon Product API
  • Facebook Login
  • Facebook Pages API
  • Google Login
  • Google Analytics
  • Google Maps
  • reCAPTCHA
  • Leaflet & OpenStreetMap
  • PayPal
  • Authorize.Net
  • Flattr

Automated testing and continuous integration

  • Jenkins
  • Travis CI
  • Behat + Mink + Selenium
  • DrupalCI
  • QTestLib

Embedded systems

  • Arduino