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MailChimp - MailChimp is the best way to design, send, and share email newsletters.
BrowserStack - BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
browserling - Live interactive cross-browser testing from your browser.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.