Pligg is a CMS that focuses on user-generated news.

Unlike other CMS like WordPress, Pligg is entirely geared towards having numerous users which all contribute to the site (think Slashdot, Digg or Reddit).

It only requires PHP 5 and MySQL to run correctly.

What you’ll like about Pligg:

• Built-in rating AND comment rating system
• Kick-ass RSS support; users can subscribe to categories, the front page, and more
• User management, profiles, private messaging, etc – all inside the default package
• Available in multiple languages
• Active community

What you won’t like:

• Relatively few add-ons (or modules), and many of them have a price tag
• Infamous previous versions create doubt about Pligg’s safety even now

• Website: http://www.pligg.com/
• Demo: http://www.pligg.com/demo/

Kryn.cms is a CMS for those who love to build stuff from (almost) scratch.

Kryn is powered by PHP and MySQL, and doesn’t require anything more than, for example, WordPress does.

What you’ll like about Kryn:

• Although Kryn is die-hard customizable, it will also work for beginning users.
• It has an extensive documentation.
• Easy to template and add extensions
• Easy internationalization
• Stylish backend (see image)

What you won’t like:

• Commercial use requires paid license
• Few extensions (Kryn is still in the beta though)

Basically, the main reason as to why use this CMS, is the extensive support and translations available in German.

Kryn should also work for those who simply want a ‘different’ CMS.

• Website: http://www.kryn.org/
• Demo: http://www.kryn.org/docu/what-is-kryn-cms/try-out-kryn-cms

Open Atrium is a pretty powerful open source intranet box.

Open Atrium is great for teams, allowing each team to have its own conversations; calendars; assignments, and blogs.

Users also have shoutboxes – these makes sharing ideas really easy.

Features include:

• A group dashboard
• Blogs (private and for teams)
• A clean, neat UI both for users and admins
• Easy user management

You’ll have to spend some time to get acquainted with it, and do something yourself — the default installation lacks features.

The developers do have the “beta” excuse though. :)

• Website: http://openatrium.com/

Similar to the Wolf CMS we covered just a few days ago, Pulse CMS is a content management system for creating smaller sites.

Pulse is written in PHP and has no database requirements.

Regrettably, however, Pulse comes in two versions: Pro and Basic. The Basic version is for free, but comes without easy internationalization, support, and ready themes. The Pro version costs $15 (not that much really).

What you’ll like about Pulse:

• A great backend.
• The basic version weighs less than 2 megabytes.
• Great for your clients — has a built-in backup system.
• Easy content management
• Drag&drop installation

What you won’t like:

• The paid version is a lot better.
• Customer support exclusively for the Pro version.

• Website: http://pulsecms.com/
• Demo: http://pulsecms.com/demo/

Wolf CMS is a lightweight CMS, which started as a fork of Frog CMS.

Wolf CMS seems to focus on a small size and flexible ends. Unlike other smaller content management systems, Wolf CMS tries not to fall behind in themes.

What you’ll like about Wolf:

• Not that many themes, but they’re all pretty.
• Flexible templates
• Neatly coded
• Nice user interface
• Page “behaviors” allow for highly customized pages
• etc.

What you won’t like:

• The “flexibility” has its drawbacks — Wolf CMS doesn’t really have an all-round purpose

u/p of the demo: admin/demo123

• Website: http://www.wolfcms.org/
• Demo: http://www.opensourcecms.com/demo/2/273/Wolf_CMS

Slim is a miniature PHP framework that weighs a mere 38 kilobytes.

Slim supports RESTful routing, and associates each one of these routes with HTTP requests (GET, POST, etc), and has additional features such as extensive error handling.

Slim has quite a few solid core features for its small size.

The framework eases coding significantly, but does miss out on the functionality possessed by more popular frameworks.

For other small PHP frameworks, check out our awesome post on them!

• Website: http://slim.joshlockhart.com/index.html