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.
Mailtrim - Email lives forever!. Reinvigorate your emailing experience with the best free email client, the Mailtrim
Microsoft 365 - Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online
MailDroid - MailDroid is an email app that you can use to manage your emails from multiple vendors in one unified inbox.
ONLYOFFICE - ONLYOFFICE is a complete office and productivity suite.
Loop Email - Emailing for teams: Organize your Inbox into channels 💌