SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Crowdin - Localize your product in a seamless way
Lumar - (Previously DeepCrawl) Hosted SEO spider to analyze and find problems with websites.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Website Checker Tech - WebsiteChecker.Tech is SaaS tool that detects SEO and availability issues of your website, making it easier for you to fix them.
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.