RetroArch is the most popular way to manage "all" emulators. Instead of downloading separate .exe files, you download one program. It uses "Cores" (modular emulators).

While there isn't a "Ninite for Emulators," some community tools help automate the setup:

Always download from the official project websites or trusted community tools like EmuDeck.

Go to Main Menu > Online Updater > Core Downloader . From there, you can select and download emulators for NES, SNES, Genesis, PlayStation, and dozens more instantly. 2. EmulationStation Desktop Edition (ES-DE)

Many users use this alongside RetroArch to create a seamless "console" experience on their PC. 3. Web-Based Automated Installers (Ninite Style)

It doesn't include the emulators itself but acts as a "frontend."