Flanger Effect

Antiknot – Free Multi Effect VST Plugin

Antiknot - Free Multi Effect FX VST Plugins

Antiknot is a free randomizable stereo signal processing VST effect plugin featuring EQ, warm saturated tri band and single band compression, flanger, delay, reverb and uniphaser units.

Rakarrack – Multi-effects processor

Rakarrack - Multi-effects processor - music software

Rakarrack is a stereo digital effects processor for Linux with jack support. Standard line-up of nearly 40 effects modules include Equalizers, Reverbs, Echo, Flanger, Chorus, Distortions, WahWah, Vocoder, and other filters and processing modules.