Newton is a fully featured mail client available for Android, iOS, macOS and Windows. Works for watch too. It's based on cloud so you can connect it to any account and get fast search, push notifications, read receipts (PREMIUM), etc
Setapp provides a curated collection of commercial apps available through a low-cost subscription.
Inuvika OVD Enterprise delivers virtualized Windows and Linux applications and shared desktops to any device, without the cost and complexity of solutions like VDI.
GameClub offers a large and growing catalog of some of the best games in the history of mobile.