Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Feather Icons - Simply beautiful open source icons
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.
IconStore - Free icon packs by first-class designers
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.