The use of spreadsheets to record tasks as a universal, minimalistic, portable, flexible, and very customizable approach that requires "no" learning curve.
A .NET 2.0 library for the 64 bit optimized handling of very large integers, up to 10240 binary digits or approximately (safe to use) 3000 decimal digits
Allocating memory from the system heap can be an expensive operation due to a lock used by system runtime libraries to synchronize access to the heap. Contention on this lock can limit the performance benefits from multithreading. Learn how to solve this problem.