I am looking for basic POS software that would work well in a shop with mostly cash sales. I don't really need something fancy, but I do like to play around. I have relatively new computers that I'll be using the software on. Currently the shop is making use of a premium software suite, which I dislike very much. I'm hoping there is a decent free or open-source option for me, but good premium software is also okay with me (just want to get away from what we're using now).
Please recommend any good POS software (free or paid) that you have used and I'll check it out.