Anki has been my bread and butter for over 10 years. It still blows my mind that it's a free piece of software. Not only that, but provides a free cloud syncing

Anki has been my bread and butter for over 10 years. It still blows my mind that it's a free piece of software. Not only that, but provides a free cloud syncing service. Wenlin and Pleco Chinese dictionary software are both amazing pieces of software. Goldendict/-ng is great for accessing EPWING dictionaries, an inconsistent, mostly undocumented, hopelessly complex Japanese dictionary format that most electronic dictionaries were published in during the 20th and early 21st century. Emacs is not only something that I've used every day for years now, but opened a whole new paradigm of computing back up to me after drinking UNIX cool-aid for the last decade. Linux and the GNU toolchain for obvious reasons. foobar2000 for a great music player, something which sadly doesn't exist on Linux. WINE for obvious and related reasons. Firefox for obvious reasons. And now I've run out of time, so mea culpa to my future self who will think of something I'll wish I'd mentioned