aderrors is a fortran 2008 library for error analysis of MC data with
the following features:

- Exact linear error propagation, even in iterative algorithms
  (i.e. error propagation in fit parameters).
- Handles data from any number of ensembles (i.e. simulations with
  different parameters).
- Support for replicas (i.e. several runs with the same simulation
  parameters).
- Standalone portable implementation without any external
  dependencies.
- Fast computation of autocorrelation functions with the FFT
  package (see http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html).
- Exact determination of gradients and Hessians of arbitrary
  functions.