Folders:
- python - Python sandbox
- nodejs - Node.js sandbox
- ruby - Ruby/Ruby on Rails sandbox
- perl - Perl sandbox
- go - Go sandbox
- dart - Dart sandbox
- air - Adobe Air sandbox
- openwrt - OpenWRT sandbox
- linux - Generic Linux development sandbox
- pnacl - PNaCl (Portable Native Client) sandbox
- meteor - Meteor sandbox
- django - Django sandbox
- gae - Google App Engine sandbox