Virtos Denoiser offers three different tools targeting stationary noise

Automatic noise analysis - denoiser estimates a noise distribution from your source material
Noise print ?noise distribution is based on a section of the recording containing noise only
User defined noise profile ?noise distribution drawn by hand in a curve editor

• Virtos Noise Wizard 1.
  Virtos Noise Wizard is a set of DirectX compatible plug-ins containing all the tools you need for high quality noise reduction and audio enhancement. With Noise...

• DART PRO 24 1.20401p
  The most advanced audio tools for maximizing sound quality and achieving professional results

• DART PRO MT 2.0p
  The most advanced audio tools for maximizing sound quality and achieving professional results. Use it to record from any audio source or use with audio files to clean up the most troublesome problems with Declick, DeCrackle, ReTouch, NoisePrint,...

• LeoPicture 1.
  LeoPicture provides a convenient instrumentation for manipulating images to broad specter of customers from digital photography amateurs to web designers and scientists

• WAVclean 1.9.
  "How noisy those PC sounds are !" Not anymore with the deep cleaning power of WAVclean! Sometimes you just would like to take your noisy WAV files and put them in a washing machine. Don't laugh because now you can do exactly that with WAVclean! It can reduce hiss noise in cassette tape, background noise in microphone...

• Noise Filter MAC 4.
  How to master noise filtering with our photo software/photoshop plugin

• Magic Denoiser 1.5
  A Photoshop/PSP noise removal plug-in designed by ImageSkill