Magnetic charging cables. Some can't take advantage of the higher speed charging (only connecting V+ and ground), but it's unreasonably nice to have cables throughout the house that can support all of your devices.
A comfortable mouse with enough buttons. A comfortable keyboard that just works, even if you don't have the driver software.
The Logitech MX series is pretty decent, though I've had to start fighting with uneven mousewheel acceleration. Corsair makes decent mice, and Razer as well.
The double click issue I've had happen with a couple of products. A Razer opto-mechanical keyboard had this crop up, a previous Logitech MMO mouse did this (double left click as well), and even a "Topre" switch keyboard had this happen. I haven't had it happen with cherry switch keyboards (yet), but I'm sure it will.
It almost seems like an industry-wide problem that combines less-expensive switch components and debouncing tolerances that are set too tightly - it's like none of the newer products are set up to handle aging switches. Just a guess though.
Sorry about that.
The other tools I use in my FX chains are all reaper built-ins and plugins.