RELIC is a modern cryptographic meta-toolkit with emphasis on efficiency and flexibility. RELIC can be used to build efficient and usable cryptographic toolkits tailored for specific security levels and algorithmic choices. RELIC is an ongoing project and features will be added on demand. The focus is to provide: Ease of portability and inclusion of architecture-dependent code; Simple experimentation with alternative implementations; Tests and benchmarks for every implemented function; Flexible configuration; Maximum efficiency.