Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
ShareButton.net - ShareButton.
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.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
ShareButtons.com - ShareButtons.