Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Spicer - Mobile app for couples to improve sex.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Naughty Grin Sex Dice - Free Online SEX DICE, Foreplay Games for Naughty, Kinky Couples
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.
Couple quest - Simple "board-like" game for couples.