Spark is good, has both MacOs and iOS versions and syncs quite well. It's free too. Another one is Airmail but it needs subscription. - Source: Reddit / about 1 month ago
Spark → This is undoubtedly the best email client, It will help you to organice your day, conbine calendars and do tasks from your inbox more quickly. - Source: dev.to / 14 days ago
Azure Data Factory - Learn more about Azure Data Factory, the easiest cloud-based hybrid data integration solution at an enterprise scale. Build data factories without the need to code.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Apache NiFi - An easy to use, powerful, and reliable system to process and distribute data.
Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Talend Big Data Platform - Talend Big Data Platform is a data integration and data quality platform built on Spark for cloud and on-premises.
Gmail - Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.