BLoC : Flutter Widgets that make it easy to implement the BLoC (Business Logic Component) design pattern. Built to be used with the bloc state management package.
Shared preferences: Flutter plugin for reading and writing simple key-value pairs. Wraps NSUserDefaults on iOS and SharedPreferences on Android.
GetIt:- Link: Simple direct Service Locator that allows to decouple the interface from a concrete implementation and to access the concrete implementation from everywhere in your App"
intl:- Link: Contains code to deal with internationalized/localized messages, date and number formatting and parsing, bi-directional text, and other internationalization issues.
Google Map:- Link: A Flutter plugin for integrating Google Maps in iOS and Android applications.
Geocoding:- Link: A Flutter Geocoding plugin which provides easy geocoding and reverse-geocoding features.
#####ETC.