Mine isn't there
 

I know it's too complex to be included here with blogging CMSes, but last year I worked with Squiz CMS. (AKA MySource Matrix/Squiz CMS)
A pain to learn, not for the faint-hearted. More of a career than a blogging platform.
But I find when people talk about the best CMS they end up admitting deference to Squiz.
Learning Squiz is my ongoing 2011 project.

A CMS to set up & walk away from? Joomla!
 

If I don't want to get endless help requests from web clients post CMS installation, I use Joomla!
Users and Administrators can get help online at a level they understand. Also the add-ons they want.

MySource Matrix (Squiz) has been added.

--jeremy

Amen brother, that's the problem. You need to be an experienced system/site manager in order to get a secure ride with "simple" CMS like this. Common webmasters don't have this ability and I think CMS is to blame for it. Cheers.

This is an excellent point. I know this is a little off-topic (maybe deserves its own thread), but have you noticed how many of the 'Get up and running with <insert CMS name> in 24 Hours' style books that say anything worthwhile about security? At least in the bookshops in which I have looked, it is more-or-less zero. This (imnvho) is seriously reprehensible, and must be, in part, responsible for the issue.

phpBB (And I do no know why it is not in list)

phpBB is not a CMS of Blogging platform, and is therefore not eligible for this category.

--jeremy

jeremy, so Joomla too. Joomla without 20 plugins is unusable(empty page with copyright string). So who restricts phpBB admins to install modification over phpbb to convert it into CMS/Blog platform? Nobody. So if no phpBB in list, Joomla should not be in list too and vice versa.

From the respective official sites:

While it's possible we'll modify the category in future years to include forum software, phpBB is not a CMS or Blogging engine. Thanks for the feedback.

--jeremy

jeremy, no I do not mind category name and poll variants as it is now. And of course,I do not trying to advertise phpBB. But term CMS can be treated differently by some people.
Does forums have properties of CMS, doesn't them? Yes, they does. Forum users can easily create content to display on site(post message), decorated(by bbcodes) or not. Users can upload files which can be downloaded by other users(in form of attachments). Users can restrict access for content(via forum permissions). Does it requires any low-level knowledge(HTML/CSS/other language used by engine)? No, it doesn't.
So I can make conclusion: forums are a kind of CMS. Yes, it is not so tunable as Joomla.

But it is not of this topic discussion.

Regards.

no, a forum is a discussion system, hence the name. A CMS is more a document/article presentation system. In that sense that the documents/articles published, are not files (e.g. .pdf), but readable embedded in a style online. This requires a different method of dealing with publishing needs. A discussion system is interactive in content, while a cms is not. (you have authors and you have optional commentors, in a forum everyone is a commentor and author at the same time, thus bial way publishing, vs single way publishing with cms)

, every one who allowed to comment or post new topics. Permission system in modern forums can setup which users can post new topics(authors), which users can only comment(commentators) and which can only view other posts(topics, threads, articles). Also topic can be locked(i.e. forbidden for comment), i.e not interactive at all.Post in forum doesn't embeded in style online? Anyway, anyone can rewrite(customise) HTML/CSS and forum structure templates to represent posts look like articles, and untutored user will treat it as CMS, not as forum. I know sample when third-party user(not forum developer) transformed forum engine into fully functional CMS(read, added more abilities to tune-up representation and behaviour of each topic/post)

Regards.

ok, let's go symantics (since you apply it)..
your case: just one group would suffice.. namely: software.. no subgroups.. just plain software.
You don't seem to make the nuances in function/audience in software programs.
Yes, you can (with some effort) turn a Bulletin Board into a cms kind of system, but a dedicated CMS is far more tailored to the needs of publishing. And ofcourse the other way, a CMS can (with some effort) turned into a Bulletin board kind of system, but a dedicated BB application is far more tailored to the needs of a bulletin board.

my3cents ;)

WordPress

Jeremy, since the poll includes blogging platforms, would you please add Apache Roller? Roller has made a lot of progress this year and is on the cusp of a new major release (RC3 status last I checked). It's not likely to win a popularity contest against all these php based offerings but Roller is a robust Java based offering that pays dividends for larger deployments (e.g. enterprise use). Sun used to use and support it (IBM and several other large corps as well), but since the Evil Ellison took over, corporate support has been pulled. Nevertheless, the lead dev, Dave, soldiers on and deserves our kudos.