This page will list as many of the versions (English and Japanese) as can be found. Note that before playing you may need to either change your system locale to Japanese or install Applocale.
Japanese (Mac OS X): http://dream-vs-dream.tumblr.com/post/58636637977/flow-v0-18-on-mac-osx-download
This is the most up-to-date version of .flow, released on August 17, 2013. Differences from version 0.17 include a new areas, a new NPC, and a few new events.
This version of .flow was released on April 2, 2012. Differences from version 0.15 include a new area, some added effect animations (activated with the shift key), and a few other small additions.
A special version of .flow released on April 1, 2012, it was intended to be an April Fool's Day joke. The game begins normally, but getting on the computer activates a strange event that possibly explains a vague backstory to Sabitsuki.
Released on July 18th, 2011. Differences from version 0.10 include 2 additional menu types (Rust and Smile), and a few other small additions.
Released on May 4th, 2011. The first version of .flow to contain the 3 endings.
Even Older Versions
Older versions of .flow have been found and archived on the internet. Their downloads can be found below. It should be mentioned
that these are significantly outdated versions, and should only be played if one is curious about how .flow was earlier in its
development. There are no endings in any these versions, and not all of the effects are implemented. Changing your system
locale/installing Applocale may also be required for these versions.
Released on October 23, 2009.
Released on August 14, 2009.
Japanese: Link is currently dead.
Released on July 4th, 2009.
Released on May 6th, 2009.