TAL-Vocoder is described as 'VST/AU plugin that emulates the sound of vintage vocoders from the early 80s. It provides 11 bands and users analog modeled components in combination with digital algorithms such as the SFFT (Short-Time Fast Fourier Transform)'. There are five alternatives to TAL-Vocoder for a variety of platforms, including Windows, iPhone, iPad, Mac and FL Studio. The best alternative is Vocodex. It's not free, so if you're looking for a free alternative, you could try mda Talkbox or Voloco. Other great apps like TAL-Vocoder are Vocalizer Pro (Paid) and VoxSyn (Paid).
Vocodex is a stunning, high quality vocoder available in VST and native FL Studio plugin formats. FEATURES Speech enhancement contouring of noise or modulator pass-through. Modulator noise reduction to reduce ambient noise bleeding through carrier.
Voloco is a real-time voice-processing app that combines automatic tuning and vocoding. You can pick a song from your library to sing or hum along to, and Voloco will automatically guess the key of the song and pitch correct your voice to that key.