Nice Tools on Unity Asset Store
Simplest Native Dialogs
This plugin shows Alert, Confirm and Toast* dialogs for Windows, WebGL and Android builds; Also works on Editor for easy prototyping.
*Toast is only native on Android and emulated on WebGL and Windows
Simplest Audio Manager
Playing a sound or a music is now easy as 1, 2, 3!!
Simplest Online Score Table
Simplifies Online Score Table management! No database required!
Runs over a standard PHP server via UnityWebRequest commands.
This allows for cross-platform compatibility without design limitations