ummar 

NModbus4 is a C# (.NetStandard 2.0) implementation of the Modbus protocol. Provides connectivity to Modbus slave compatible devices and applications. Supports ASCII, RTU, TCP, and UDP protocols. NModbus4 it's a fork of NModbus(https://github.com/NModbus4/NModbus4)

InfluxData.Net is a fast, portable .NET library to access the REST API of an InfluxDB database and Kapacitor processing tool. The library supports .Net Framework v4.6.1 and .Net Standard v2.0. This library is just a Fork of original driver with added support of micro and nano seconds.

NModbus4.Serial Class Library