When comparing Nette vs Joomla!, the Slant community recommends Nette for most people. In the question“What are the best PHP frameworks?” Nette is ranked 12th while Joomla! is ranked 19th. The most important reason people chose Nette is:
Nette is built to help developers create good, maintainable code using the DRY principle.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Built around good programming practices
Nette is built to help developers create good, maintainable code using the DRY principle.
Pro Open source
Nette is open source and is distributed under the MIT license.
Pro Highly customizable templates
Joomla allows for heavily customizable templates to be changed from the admin interface without needing to hack.
Pro Powerful and user-friendly admin interface
Admin interface is constantly being iterated on to remove unnecessary legacy features and to streamline the interface. Resulting in a very clean and easy to understand interface that also offers a wide range of options.
Pro More than 8000 extensions
Which can be found here.
Pro Easy to pick up
Pro Great for social networking and commerce sites
Joomla has both a good native support and a great list of extensions that make creating either a social networking or a commerce site easy.
Cons
Con Hard to find information in English
Nette is mostly used in the Czech Republic and Slovakia and most of the information coming from third-party sources is not in English.
Con Insecure
It's common-place for a Joomla-based website to be defaced, often very quickly. This is most often due to the low quality of extensions.
Con Extensions are scarce, badly maintained & rarely good
If it's not part of the default Joomla installation, quality extensions are rare. Joomla has a extensions library, but it is full of abandoned, dated or bloated components, modules and plugins.