Products I use
Many development businesses will point you in the direction of commercial software with costs ranging from $150 to much more. In my opinion, there is no advantage in paying for these products as a small business owner. The open source software that is freely available via a general public licence (GPL) is at least as good as most products on the market, and often offers better support.
For content management, I use Website Baker, an open source, PHP-based Content Management System (CMS) designed with one goal in mind: to enable its users to produce a website with ease.
For online shops, there are a few options available, depending on the number of payment options and catalogue size. I haven't seen one that I really liked yet, that ticked all the boxes AND was free. So I'm open to suggestions. Lots of online shop products are pay-by-month, from $10/month up. I can create a custom look for any online shopping product based on Apache/PHP and HTML/CSS (that's most of them).
I encourage my customers to make donations to open source products used when their websites go live. Donations encourage the developers of open source software and show our appreciation. If there is a particular product you are interested in, please feel free to contact me and ask.