Jan 27 2009: more links,particularly Zwiki
Revised Oct 3 2008: it's still Plone as the premier Python CMS so far ... still looking.

Python is an admirable language in almost every way ( but don't get me going about 'self' in method calls - if Smalltalk programmers see 'self' all over the code, they add $10 to their hourly rate, usually well deserved ).

Updated Oct 29 2008: added 68KB, now BSD

I am not sure why it took me this long to get around to CodeIgniter ... it's a worthy and mature PHP framework but I gravitated to CakePHP for some reason. Maybe it's the CodeIgniter licensing of EllisLab, Inc..

A nascent category for "associative" engines, neural networks and various statistical and connectionist approaches to inferencing.

Updated Sept 24 2008:

The Lanius website ( formerly known as the Drake CMS ) is up and running [ wild cheers and celebration !!! ]

They have make some of their first production releases of the small, quick and generally admirable CMS.

I'll install it and see ... stay tuned.

Updated Sept 24 2008: extract from old article.

One of the more popular classes in any OO environment is the Process class. The Squeak implementation of Smalltalk even has a special OSProcess plugin to the virtual machine ( VM ) that provides 'eyeball-to-eyeball' OS level support for threads. I keep trying to come up with big XML workloads to test the limits of the stdin/stdout channels.

Updated Sept 19 2008: added Ruby/EventMachine links
Updated Sept 19 2008: more links for Ruleby

Not a major category among the many rule engines implemented in Java and other languages. In this case, I've pushed the definition of 'engine' to the limits so I can include some of the more solid and interesting implementations.

Updated Sept 24 2008: added features and SWCL link

Updated Sept 28 2008: fixups and links

From the CakePHP project site at ohloh.net:

Cake is a rapid development framework for PHP which uses commonly known design patterns like ActiveRecord, Association Data Mapping, Front Controller and MVC. Our primary goal is to provide a structured framework that enables PHP users at all levels to rapidly develop robust web applications, without any loss to flexibility.

Updated Sept 16 2008: Note that this is not a complete list of Java workflow applications, just the ones that I have found and interest me.

Oct 5 2009: PyKE 1.0.2 download, seems to be fairly active
Updated Jan 26 2009: new SimPy 2.0 release, Twisted framework, more links
Updated Oct 29 2008: added Narval

An important and growing segment of the rule engine world ... Python runs fast, a necessary requirement for all large rule-based applications.

More pattern matching and structural parsing than symbolic processing in a classical sense of an inference engine.

Updated Oct 3 2008:

C++ engines are often neglected for web-based inferencing applications, but compilation is possible on non-shared hosting ...

Of the 702 Semantic Web tools listed in Mike Bergman's masterlist, 332 are implmented in Java .... and Java now being a fully open source and open licence language ...

Stray link I'll find a home for: http://www.daml.org/tools/

SWCL - Semantic Web Client Library:

March 19 2009: Pharo will be going beta with version 1.0 !!! I thought they said it would take three years ... glad it didn't :-).

Updated Oct 2 2008: The Mission

There is a decided dearth of good PHP open source search engine solutions, but Sphider seems to be the leading candidate these days - "a lightweight web spider and search engine written in PHP, using MySQL as its back end database".