1. Nein LinqNeinLinq provides helpful extensions for using LINQ providers such as Entity Framework that support only a minor subset of .NET functions, reusing functions, rewriting queries, even making them null-safe, and building dynamic queries using translatable predicates and selectors.
2. nein-mathNeinMath is playing around with arbitrary precision integers, written in pure managed code, not using any unsafe stuff, and a bit faster than the build-in .NET type for integers with a few thousand bits.