Wanchain is a cross-chain protocol for inter-chain transactions. It was originally a fork of Ethereum, but is now a completely separate blockchain called the WAN chain, that also has a Proof-of-Stake (PoS) consensus mechanism. Wanchain is designed to be a decentralized and interconnected platform to exchange digital assets across separate blockchains. It is meant to connect the growing number of blockchain projects and make them inter-operable.

Aelf calls itself a decentralized self-evolving cloud computing network. It is a blockchain operating system that can be customized for development needs. AElf hopes to improve upon current blockchain platforms by emphasizing their unique governance system and sidechain architecture.
AElf's most important feature is its multilayer sidechains and mainchains that can be used for a variety of purposes. Each chain is dedicated to a single use case, and tasks can be distributed more efficiently across multiple chains.
AElf enables cross-chain exchanges of value and has a cross-chain messaging functionality that works with other blockchains, including Bitcoin and Ethereum. Aelf enables parallel processing of transactions that promises to improve performance.
AElf users can create private chains that operate in a similar way to the Amazon's cloud hosting service, allowing developers to utilize the private chain modules to maintain full ownership of their DApps on the Aelf computing network.
Aelf has a Delegated Proof-of-Stake consensus mechanism (dPoS). ELF token holders vote on the nodes that will become mining nodes. Those elected nodes then decide how mining incentives are distributed among stakeholders and other nodes. The number of miners on the network is equal to 2N plus 1, with N beginning at 8 and increasing by 1 every year. Miining nodes relay and confirm transactions, transfer data, and package blocks.
The ELF token is also used as a mechanism for the sidechains to be indexed on the mainchain. These indexing fees vary depending on how much the sidechains contribute to the overall ecosystem.

pTokens are digital assets that are transparently pegged to another underlying asset. pTokens serve as a Cross-Chain token wrapper that allows users to more easily transfer value between different blockchains. Users can deposit a certain amount of the underlying asset (such as BTC or EOS) and request the equivalent pTokens that are pegged to them 1:1, such as pBTC or pEOS. Token holders can then take advantage of the Ethereum network by more easily exchanging them into ERC-20 tokens.