Cue 100 comments about "you are paying with your data", but I use the following tools (happily) without paying for them with money: Gmail and the Google suite of products (drive, chrome, etc), Feedly, various social networks, Hubspot CRM, eventvods.com (I donate to them), Trello, Goofy (FB messenger for desktop), Sublime Text, RescueTime, AutoMute, Flux, Metabase.