Elrond is a blockchain protocol that seeks to offer extremely fast transaction speeds by using sharding. The project describes itself as a technology ecosystem for the new internet, which includes fintech, decentralized finance and the Internet of Things.
Klaytn is a hybrid blockchain project that is an enterprise-grade, service-centric distributed ledger technology (DLT) platform, which aims to offer a user-friendly blockchain experience. The platform is a combination of features found on public blockchains and private blockchains through a hybrid design.
Algorand builds technology that aims to accelerate the convergence between decentralized and traditional finance by enabling the creation of financial products, protocols, and exchange of value including NFTs, stablecoins, payments, and more.
Dogecoin is a cryptocurrency inspired by the "doge" Internet meme, which was popular at the time of its creation. The main functionality it provides to users is to securely and anonymously send and receive online payments, and it is most commonly used as a tipping cryptocurrency for online creators on numerous social media platforms.