AdamWhite 

An arbitrary precision decimal (base 10) floating point number type using a mantissa and exponent. Supports nth roots, trigonometric functions, logarithms, natural e, pi, etc.

Arbitrary precision rational number class. Stores the numerator and denominator.

A univariate, sparse, symbolic, BigInteger polynomial arithmetic class.

A symbolic, multivariate integer polynomial arithmetic library.

Library to perform symbolic polynomial arithmetic on generic numeric types.

Arbitrary precision complex (imaginary) numbers.

A complex polynomial arithmetic class..

A symbolic, multivariate integer polynomial arithmetic library.

A generic arithmetic library. Allows you to perform arithmetic on any numeric type. All .NET numeric value types are supported, as is any custom numeric type--just implement the numeric operator overloads.

Data first or code first ORM. Entity-object-class-poco to SQL repository mapping, and vice versa. Data to C-Sharp class code or emit assembly. Can dynamically generate assemblies, C-Sharp code, and SQL scripts... More information

A generic Vector numeric type. Supports: Scalar arithmetic, vector arithmetic, square root, dot product, normal, reflection, distance, lerp, sum of squares and cosine similarity.