AppTek - AppTek offers solutions for transcription, translation and to analyzetelephony, audio and video content.

Glosbe - Huge collaborative massively multilingual dictionary.

Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.

Visuwords - The fun and free way to look up definitions. THE graphical dictionary and visual thesaurus.

Transifex - Transifex makes it easy to collect, translate and deliver digital content, web and mobile apps in multiple languages. Localization for agile teams.

Wordnik - the biggest online English dictionary, by number of words