AWeber - AWeber is an Email marketing software that's easy to use. Send email newsletters & autoresponders and deliver top notch emails.
Tubics - SEO & analysis for YouTube videos
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
VidIQ - Generate tags for YouTueb Videos. Works as a browser extension .
ActiveCampaign - Integrated email marketing, marketing automation, and small business CRM. Send beautiful newsletters, setup behavioral based automations, and benefit from sales automation.
Biteplay - Create highly targeted Youtube ad campaigns in 5 minutes