"The Grøstl hash function is a finalist in the SHA-3 competition organized by NIST. In this paper, we describe a number of implementation techniques and tricks for Grøstl. They allow us to develop a range of efficient implementations for various platforms, from 8-bit microcontrollers to modern desktop processors using 256-bit AVX instructions. These results demonstrate the implementation flexibility of the algorithm and we hope will inspire further optimizations and ports to other platforms. The information in this paper will also be useful for developers planning to implement Grøstl efficiently on the platform of their choice. Furthermore, we believe also hardware implementations may benefit from the optimization techniques presented in this paper."
What we don't like:
Groestl could really improve their marketing. Groestl has superior technology to many transfer and store value coins. Without better brand recognition another new coin could come along and steal their thunder. The quest for adoption may be difficult as many other cryptocurrency projects are trying to do the same thing.
What we like:
GRS tokens can be transferred at no fee. GRS tokens can also be sent anonymously. The Samourai wallet has anonymity encryption capabilities and security, as it allows for private stealth addresses with both TOR and VPN support. Groestlcoin uses GPU mining making it really economical to mine from a hardware and software cost perspective. Groestlcoin is ASIC resistant to help prevent any centralization. A 6% weekly decrease in the block reward incentivizes growth in the value of the token. The development team and community are both very active on the project.