Golem is described as 'global, open sourced, decentralized supercomputer that anyone can access. It's made up of the combined power of user's machines, from personal laptops to entire datacenters' and is an website in the Bitcoin & Cryptocurrency category. There are more than 50 alternatives to Golem, not only websites but also apps for a variety of platforms, including Linux, Windows, Mac and Android. The best alternative is DigitalOcean. It's not free, so if you're looking for a free alternative, you could try Ethereum or Litecoin. Other great sites and apps similar to Golem are Amazon Web Services (Paid), elasticsearch (Freemium, Open Source), NameCoin (Free, Open Source) and Bitcoin Cash (Free, Open Source).
HiveNet is a distributed cloud computing network, which enables computer owners anywhere in the world to securely rent out their idle computing resources for an income. Customers pay for these computing resources to perform their valuable tasks.
NERVA (XNV) is an untraceable and secure cryptocurrency aim to be GPU and ASIC resistant via the new Cryptonight Adaptive POW algorithm. NERVA offers true privacy and fungibility, is untraceable and unlinkable, with users and transfer amounts hidden.
Primecoin is an innovative cryptocurrency, a form of digital currency secured by cryptography and issued through a decentralized mining market. Derived from Satoshi Nakamoto’s Bitcoin, Primecoin introduces an unique form of proof-of-work based on prime numbers.