Fruity Soft Clipper is a CPU-friendly soft limiter. Soft limiting avoids clipping by applying gentle (soft knee) compression to the input signal. It is worth noting that soft knee compression will cause 'saturation' effects when the signal level exceeds the threshold level. While a little saturation brings 'warmth', too much can sound distorted. Whether or not the soft clipping saturation is audible will depend on the level applied to the signal. A closely related plugin is Fruity Limiter and is probably best used if you need a more transparent clip protection.