When thinking and talking about tools you need as a poker player, the focus is usually on poker-specific tools, like hand trackers, HUDs, solvers, ICM calculators, etc. However, if you play online for serious amounts of money, there is a whole different set of apps and programs not specific to poker that will make your life much easier.
These are tools designed for people who spend a lot of time online and need additional layers of protection and/or privacy. Online poker players certainly belong to this category, regularly transferring large amounts of money and making their living playing a game where information is everything.