Master branch: 
DarkIntegers.jl is a lightweight library for working with unsigned integers and polynomials. It includes:
- Modulo arithmetic for primitive types;
- Regular and modulo arithmetic for multi-limb (fixed size) unsigned integers;
- Arithmetic for cyclic and negacyclic polynomials, including Karatsuba multiplication and multiplication via NTT
It is intended as a partial replacement for Nemo.jl, which requires compilation of C libraries, and is often slower (in particular, because DarkIntegers does not need C calls and heap allocations for operations with multi-limb integers).
Note: the library currently does not provide constant-time guarantees for arithmetic operations.