DeepL — This machine translation engine consistently produces translations that are of a better quality than competing machine translation engines.
Google Translate Mobile App — With dictation, OCR, handwritten character recognition, and other features, this app, unlike most competing translation apps, is completely free.
Google Chrome Translation Feature — If you use Chrome, you can translate any webpage by clicking the translate icon.
Smartcat — This is a free professional translator's tool which can pull in machine translation from a number of machine translation engines.
Google Sheets Translation Formula — This is a spreadsheet formula that can translate text in a Google Sheet into any of Google Translate's available languages.