B.Serrano is a French freeware plugin developer that releases a catalog of free VST instruments and effects for Windows. The project's output spans hybrid and FM synthesizers, samplers, filters, and effects, distributed directly from its personal website and mirrored through plugin archives such as Plugin Boutique, KVR Audio, and Plugins 4 Free.

The lineup includes synthesizers like Dionysos, Pluton, Selena, Adonis, Stratos, Radium, and Anubis 2, the Osiris XT sampler, the Orpheus strings-and-organ instrument with 128-voice polyphony, and filter plugins such as Vesta, Ceres, and Nibiru 2. On the effects side, the IO bundle collects a paraphonic multifilter, stereo phaser, multi-level adjuster, multi-level auto-pan, and ring modulator, while Red Shift 3 offers a dedicated phaser. Many of the plugins share a distinctive GUI envelope system whose time ranges stretch from nanoseconds to multi-hour sweeps.

The developer has built a niche reputation in the free-VST community for experimental synthesis designs and deep modulation options, with coverage in outlets like MusicRadar and a long-running presence on freeware-plugin listings.

B.Serrano has 11 products cataloged on Equipboard, including Synth Plugins, Filter Plugins, and FX Bundle Plugins.