Similar to Flask

CherryPy

Web2py

Django (web framework)

Zope

List of open-source codecs

Alien (file converter)

Apache Axis2

Apache Cordova

Apache Geronimo

Apache Hadoop

Apache Hive

Apache James

Apache Maven

Apache Velocity

Apertium

Aptana

Arora (web browser)

AviSynth

Berry Linux

Blackbox

Brackets (text editor)

Cacti (software)

CakePHP