MailChimp - MailChimp is the best way to design, send, and share email newsletters.
hashtags.org - Hashtag is an extensive hashtag research platform for analytics and tracking of hashtags, providing...
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
ExportData.io - Export Twitter data for your business needs.
GetResponse - Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.
Hashtagify.me - Free hashtags search engine, with paid advanced analytics