- Sublime Text 3 for writing.
- Audacity to record myself.
- Photo Booth (Mac) as a webcam feed to, literally, watch my lips.
- Wiktionary, foremost en.wiktionary.org, but also local editions (ru.wiktionary.org, hu.wiktionary.org, etc.)
- Alfred to create shortcuts to online dictionaries and other reference sites
- Alinof Timer (Mac) to work in chunks of X minutes
- Lang-8.com to receive free corrections on your writing. Unfortunately, they're closed to new registrations, but you can use HiNative instead.