Although my work on Fluxr (a RESTful front-end for the OpenWFEru
workflow engine) was sidelined, I was able to salvage some of it and
have now released Taskr, a RESTful front-end for the OpenWFEru
scheduler.

From a functionality point of view, Taskr is basically a networked
cron, with a REST API so that jobs can be scheduled and managed via
REST calls over HTTP. It's a stand-alone server, so all you need to do
is install via rubygems (`gem install taskr`), configure a single YAML
file, and run the daemon. The server handles persistence, provides a
simple web-based UI, and exposes the REST API for other RESTful
services.

You can find out more at http://ruby-taskr.googlecode.com

Taskr can handle fairly sophisticated jobs, making it a pretty
versatile tool -- especially as part of a larger REST-based  service-
oriented architecture. For example we're using it to execute arbitrary
ruby code on our remote Rails servers. We're slowly replacing all of
our cron jobs this way, since Taskr gives us a centralized place to
manage and keep track of all of the various scheduled actions needed
by our Rails apps.

Another useful feature is Taskr's ability to make scheduled REST
requests to other RESTful services. We use it for example to check the
status of certain things at the start of the business day, and then
send off email notices via a Howlr messaging daemon (http://
howlr.googlecode.com).