LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Microsoft 365 - Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online
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.
ONLYOFFICE - ONLYOFFICE is a complete office and productivity suite.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.