Bonus question (optional)– During the Covid pandemic, we al…

Bonus question (optional)– During the Covid pandemic, we all had to adapt and use different resources for work, studies and social interactions. Which new application software did you start using, that you may have never discovered if it wasn’t from the pandemic and why? ‘Or’ (if you didn’t use anything new) what was the most useful application software you used during this period and why?   (just one or two paragraphs answer is fine)