CKAN allows you to pick and choose which features you want to use for your data portal. Or, you can easily develop your own by following the extending guide!
There are over 200 community extensions which have been published under open source licenses by contributors from all over the world. You can search through our curated list of extensions to find what you are looking for.
If you need support developing extensions for your data portal then just contact one of our commercial members of the CKAN Association. Or, ask on the developer mail list or users mail list to find people who you can collaborate with on new extensions.