If you are looking for a high-quality brickwall limiter without a price tag, these free VSTs offer similar "ultramaximizer" performance:
: High-performance re-quantization and dithering system with ninth-order noise shaping. ARC (Auto-Release Control) l2 ultramaximizer vst free download
If you want the "L2 sound" without spending a dime, several free VSTs offer similar transparency and ease of use: 1. Thomas Mundt LoudMax If you are looking for a high-quality brickwall