Ardor is the baby of NXT and it runs on its Security protocol and Tech. It is a scalable blockchain service and business facilitator developed by Jelurida and was founded some four years ago.
It has a unique architecture that provides an ecosystem that allows company to build their apps, products and services via its child chain
Ardor like Nxt makes use of proof consensus Algorithm that has removed mining competition and nodes using amazingly low energy and economical gears.
I believe it is designed to provide solutions to bottle necks in the industry currently like blockchain bloat, one token dependency and desire for seamless and uniquely adaptible blockchain solutions
Its PoS is 100 percent functional useful to both private and public implementation and the best part is you get to use on desktop and mobile devices.
It also runs an ecosystem that stands out and operates independently, its child chain for instance has its own token and all its built in features allowing addition of permissioning if you so like it.
I liked the fact that all its child chain are interlinked while their token can be seamlessly traded on decentralized coExchanges which from my experience are safe and hack proof, hence other objects like currencies,properties accounts and assets can be accessed frictionlessly from any child chain.
Its scalability aids easy pruning of no longer needed child chain transactions while their hash are embedded in the parent chain.
The following companies have proven the viabilities of Ardor namely: Ignis,Ardorgate, BitSwift, Max Property Groups, Traffic among others. A trail will definitely get you hooked to Ardor.