Top 20 NuGet extender Packages

Contains basic tools for Rjindael encryption, password hashing and type conversion as well as helpful extensions for basic typs like Images, String and Lists.
Extender for StackExchange.Redis
A light-weight (actually contains one class :) ) library that extends any unsealed type at runtime.
The MenuExtender is an ASP.NET extender which turns unordered lists (UL) into multi-level menus. Features include: horizontal and vertical menu rendering, full keyboard support, 508 compliance, CSS styling for complete control over appearance, and menu closing delay to prevent accidental menu closin...
Json.NET web client
Extenders utilities for all purpose