Top 20 NuGet online Packages

Package for quota manipulation
The Exact Online Client SDK provides a rich application framework and simplifies the interconnection with the Exact Online RESTful API
Microsoft Team Foundation Distributed Task Web API Integrate with Team Foundation Server 2017 and Azure DevOps Services from desktop-based, ASP.NET, and other Windows applications. Provides access to the Distributed Task Service via public REST APIs.
Microsoft Visual Studio Services Client Integrate with Team Foundation Server 2017 and Azure DevOps Services from desktop-based, ASP.NET, and other Windows applications. Provides access to shared platform services such as account, profile, identity, security, and more via public REST APIs.
SuperOffice CRM Web is for extending onsite installations with custom dialogs, controls, datahandlers, filters, ajaxmethods, etc. This is for onsite integrations only!
Azure DevOps Server Client Integrate with Azure DevOps Server, Team Foundation Server 2017 and Azure DevOps Services from desktop-based, ASP.NET, and other Windows applications. Provides access to version control, work item tracking, build, and more via public REST APIs.
Microsoft Visual Studio Services Client (Interactive) Integrate with Azure DevOps Server from desktop-based Windows applications that require interactive sign-in by a user.
Azure DevOps Server Extended Client Integrate with Azure DevOps Server, Microsoft Team Foundation Server and Azure DevOps Services from desktop-based Windows applications. Work with and manage version control, work items, and build, and other resources from your client application.
Microsoft Team Foundation Distributed Task Common Contracts Integrate with Team Foundation Server 2017 and Azure DevOps Services from desktop-based, ASP.NET, and other Windows applications. Provides the models used to access the Distributed Task Service via public REST APIs.
This SharePoint javascript library is designed to easily interact with the SharePoint REST api.
This library extends the Bootstrap framework to create modern components in SharePoint 2013/Online.
Online appointment scheduler for any type of business. Flexible and affordable booking software that can be integrated into any site. Free basic version.
Microsoft Visual Studio Services Release Client Integrate with Team Foundation Server 2017 and Azure DevOps Services from desktop-based, ASP.NET, and other Windows applications. Provides access to the Release Service via public REST APIs.
SuperOffice Online Core assists apps with SuperOffice federated authentication.
A client side library that used to communicate with the Cloud Governance(AvePoint online services).
more-365 enables communicating with Microsoft 365 services from a server-side application (aspnetcore / Azure Functions) For Example: Azure AD Authentication using Certificates from Key Vault, Dynamics 365 Queries + Batches, SharePoint File Upload / Download, Graph API convert to PDF + send email
The CData Exact Online Data Provider allows you to connect to Exact Online objects.
Enables you to use standard drivers to connect to a variety of QuickBooks Online data sources like QuickBooks Online customers, vendors, etc.
XrmToolBox Plugin for the Online Management API
Simple library for loading Ragnarok Online GRF files