If you download the Qlik Sense Desktop Client from www.qlik.com
there are few example Apps in it already.
You can check out Youtube for several Demo Videos i guess.
Or you can just go here Qlik Demos: See Qlik Sense in Action | Sense-Demo.Qlik.Com
you will need to be logged in with a user to the qlik.com website to go to the download section.Once you are there you should have the option to download certain apps. Be aware as I dont think all demo apps are available for download.
Please mark this answer as helpful and correct if this helps.
I have found that the new website is basically the US version. The previous version is still available in localised versions. For example, UK can access Business Intelligence and Data Visualization Software | Qlik, found under choosing your language (change from English (USA) to United Kingdom to access the UK site.
This then allows you to access the previous site with the downloads as before.
My previous response of still requiring a login to the site is still valid however.
I hope this helps. Please mark this as helpful and correct if so.