| Complex | Complex numbers |
| DFTConvolution | Convolution based on Discrete Fourier Transformation |
| DirectConvolution | Direct computation of the convolution |
| IConvolution | Convolution of two vectors of complex numbers |
| IDFT | Discrete Fourier Transformation |
| IterativeFFT | Iterative Discrete Fourier Transformation |
| ParallelFFT | Pararelized version of IterativeFFT |
| ParallelFFT::FFTBatch | Batch of FFT work |
| PolynomialConvolution | Convolution based on polynomial evaluation and interpolation |
| RecursiveFFT | Recursive Fast Fourier Transformation |
| ComplexTest | Test of FFT::Complex |
| DFTConvolutionTest | Test of FFT::DFTConvolution |
| DirectConvolutionTest | Test of FFT::DirectConvolution |
| IterativeFFTTest | Test of FFT::IterativeFFT |
| MockDFT | A mock implementation of IDFT |
| ParallelFFTTest | Test of FFT::ParallelFFT |
| PerformaceTest | Tests the performance |
| PolynomialConvolutionTest | Test of FFT::PolynomialConvolution |
| RecursiveFFTTest | Test of FFT::RecursiveFFT |
| UnitTest | Unit testing facility |
| UtilsTest | Test of FFT::Utils |
| Utils | Collection of general purpose functions |
1.5.8