Free software does not necessarily equal open source. Not all open source is free, but usually it is.
"Shareware"
"Freeware"
"Malware"
"Adware"
Paid software does not necessarily mean it's not open source, but usually it isn't.
Microsoft Office
QuickBooks
TurboTax/HRBlock
Adobe Creative Suite
Software that you need to install on your computer typically is not open source.
Creating this type of software is generally considered much more complicated than building software for the web.
Any website that allows interaction could be considered a type of software.
By it's very nature, the web is "open" in that you can in most cases "see" the "code" running the "page".
Cloud software is pretty much web software, but with features that make it more like using traditional computer software.
Usually you can save things on the cloud servers and access it from anywhere, like a mobile device, a hotel desktop computer, or your laptop.
Apps are software that gets installed on your mobile device from an "app store" like Apple Store or Google Play.
Most apps are not open source, as everything runs through the business model of the app store.
Is it open source software or not?
What are some examples of common open source software?
200 million websites
1 out of 10 desktop
browsers
vs. $99-$600+ for pro
audio software
Easy to install and use!
Requires knowledge to install
Requires domain knowledge to use
Must be a programmer to use