Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.

GoldenDict - The program has the following features: Use of WebKit for an accurate articles' representation, complete with all formatting, colors, images and links.

DeepL Translator - DeepL Translator is a machine translator that currently supports 42 language combinations.

LibreTranslate - LibreTranslate is a free and open-source and self-hostable machine translation server. It also has a public instance designed for personal or infrequent use.

LibreTranslator - Android translation app with translations from LibreTranslate

Linguee - English Dictionary and Translation Search with 1,000,000,000 example sentences from human translators. Languages: English, German, French, Spanish, and Portuguese