Top 20 NuGet material-design Packages

Material Design Icons for Blazor, Razor Pages and so on from https://materialdesignicons.com/ .
Xamarin.Android lib to show horizontal progress like Instagram Stories
Make your native android Toasts Fancy. A library that takes the standard Android toast to the next level with a variety of styling options. Style your toast from code.
A colorful Android SeekBar for picking color
An Android implementation of the Discrete Slider component from the Google Material Design Guidelines
Xamarin.Android Binding for Rafael Almeida Barbosa's AchievementView, an Android library Achievement View to show message or information in your app
Super Lite Android Library to select files/directories from Device Storage.
Xamarin.Android lib to show triangle view as badge
Android loading view library
Android's seekbar that contains 2 cursor (left and right). Multiple touch supported.
A custom SeekBar on Android, which can be changed the size, color, thumb drawable, tick drawable, tick text and indicator, also, will show an indicator view with progress above SeekBar when seeking.
Xamarin.Android library to show reacting badges like Facebook.
An Android library to build flying animated toast message.
Lollipop ViewAnimationUtils.CreateCircularReveal for everyone 4.0+
Convert your TextView in ExpandableTextView with added options ReadMore/ReadLess.
BadgeView for Xamarin.Android
TheFinestArtist's Annotations
Round Corner RelativeLayout for Xamarin.Android
Apache Commons Net library implements the client side of many basic Internet protocols such as FTP/FTPS, FTP over HTTP (experimental), NNTP, SMTP(S), POP3(S), IMAP(S), Telnet, TFTP, Finger, Whois, rexec/rcmd/rlogin, Time (rdate) and Daytime, Echo, Discard and NTP/SNTP
Color picker for Android. Easy to use, fully functional color picker with compact design based on HSV color model.