Headquartered in Hong Kong, Miner Bros is a mining equipment seller. The customers are able to purchase devices capable of mining cryptocurrencies online and pay in Fiat or BTC. The company deals into brands like Bitmain, Innosilicon, Baikal, IBeLink, and Whatsminer. The product shipments are performed within 48h of the order confirmation.
Black Arrow Software has a range of products across the hardware space for crypto currencies. It's original push was for Bitcoin ASIC's with it's Minion Chip. It soon expanded into Litecoin ASICS with the Minion2 chip. Although its chip bundles are prohibitively expensive for most as they are large bulk orders - there are options to buy in smaller quantities.
The Company does produce a mining rig range - the Prospero X-1 and the Prospero X-3 - although pricing has to determined by contacting the Company.
Furthermore the Company has just introduced its own hardware wallet - the eWallet.
Cruxpool is a mining pool made for miners by miners and operated by the company ILIIUM. It provides a bunch of tools to help miners monitor their mining rigs: real-time statistics, professional support (with a dedicated Discord), 0% fees for two months, very low threshold (0.01 ETH), and complete API and tutorials.