From: Eric Wong on
Rainbows! is an HTTP server for sleepy Rack applications. It is based on
Unicorn, but designed to handle applications that expect long
request/response times and/or slow clients. For Rack applications not
heavily bound by slow external network dependencies, consider Unicorn
instead as it simpler and easier to debug.

* http://rainbows.rubyforge.org/
* rainbows-talk(a)rubyforge.org
* git://git.bogomips.org/rainbows.git

Changes:

This release should fix ThreadSpawn green thread blocking issues
under MRI 1.8. Excessive socket closing is avoided when using
Thread* models with Sunshowers (or clients disconnecting
during uploads).

There is a new RevFiberSpawn concurrency model which combines
Rev with the traditional FiberSpawn model.
--
Eric Wong