Mailzak - Give a boost to your #EmailMarketing
Crowdin - Localize your product in a seamless way
rasa.io - Get more from your email list.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Mailblast - Email marketing on a budget using Amazon SES
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.