Xamarin Forms is great if you want to develop apps for different mobile platforms. But when it comes to touch gestures, it is still very limited.
For more than a year they only had the TapGestureRecognizer. Although they did add some others lately, they still don't provide all information which you need. Furthermore the API which they use has been copied from iOS and is not what a .NET developer would expect.

Telerik UI for Xamarin offers a variety of the most essential controls and VS item templates to enable every developer, regardless of their experience, to build professional-looking modern mobile applications for iOS, Android and UWP from a single code base.

LiveXAML runs while you are debugging your application inside an emulator. Whenever you save any XAML file, it automatically updates the running application. LiveXAML has no restrictions on libraries or code usage. You can interact with the interface as you normally do. No additional configuration needed besides initial installation.

Telerik UI for Xamarin uses the Xamarin.Forms technology, which makes it possible for developers to build native iOS, Android and Windows Phone apps from a single shared C# code base. The Telerik Chart and Calendar for Xamarin enables developers to easily implement various charting functionalities in their Xamarin.Forms projects and achieve the same scenarios across platforms using a single shared C# code base.

An essential set of 158 flexible, reliable and high-performance controls and libraries, for all Windows platforms. UI controls for your application front-ends, and data handling libraries for the back-ends. Frequently updated, and backed by a responsive support and development team whose sole ambition is your complete satisfaction.

Telerik UI for Xamarin uses the Xamarin.Forms technology, which makes it possible for developers to build native iOS, Android and Windows Phone apps from a single shared C# code base. The Telerik Chart and Calendar for Xamarin enables developers to easily implement various charting functionalities in their Xamarin.Forms projects and achieve the same scenarios across platforms using a single shared C# code base.

In Rebex Total Pack you'll get all .NET, .NET CF, Xamarin.iOS, Xamarin.Android components from Rebex in one pack: SFTP, FTP, FTPS, IMAP, EWS, POP3, SMTP, NTP, SNTP, Time, Daytime, Mail, HTTPS, SSH Shell and Telnet Terminal emulation, Security, ZIP compression.

Components included
Rebex SFTP for .NET
Rebex FTP/SSL for .NET
Rebex Secure Mail for .NET
Rebex Security for .NET
Rebex Terminal Emulation for .NET
Rebex Time for .NET
Rebex ZIP for .NET
Rebex File Server for .NET
Rebex HTTPS for .NET

Telerik UI for Xamarin uses the Xamarin.Forms technology, which makes it possible for developers to build native iOS, Android and Windows Phone apps from a single shared C# code base. The Telerik Chart and Calendar for Xamarin enables developers to easily implement various charting functionalities in their Xamarin.Forms projects and achieve the same scenarios across platforms using a single shared C# code base.

Dotfuscator is a .NET Obfuscator & much more. It provides enterprise-grade app protection, greatly reducing the risk of piracy, intellectual property theft and tampering. Our layered obfuscation, encryption, watermarking, auto-expiry, anti-debug, anti-tampering and alerting and defense technology provides protection for hundreds of thousands of applications around the world.

100% managed code Excel file manipulation engine & Excel & PDF report generation for .NET, Xamarin.iOS, Xamarin.Android, Xamarin.Mac.

Feature overview
Create applications, webservices and mobile device apps that read and write Excel files on the fly and fast with FlexCel Studio for .NET
Native .NET components (no additional OLE/dlls required) allowing to read, create and modify native Excel .XLS and .XLSX files without needing to have Excel installed
Supported Excel 2 to 2019 file formats