
Citadel Wallet
Citadel Wallet is a specialized hardware wallet designed to offer robust security and a seamless user experience for individuals interacting with the Hedera Hashgraph network. Its development was supported by HeadStarter's Builder Labs.
It features a full suite of secure storage options focused on providing secure storage and transaction capabilities for Hedera's native cryptocurrency, HBAR, as well as Hedera Token Service (HTS) tokens and non-fungible tokens (NFTs).
The Citadel Wallet device emphasizes high-grade security, incorporating features such as Common Criterial Evaluation Assurance Level 6+ (EAL8+) certified Secure Element and a secure microprocessor featuring Trust Zone technology to protect users' private keys offline.
Citadel Wallet is engineered to support the full spectrum of Hedera network services, including native staking, interaction with smart contracts, and management of various Hedera-based assets. It also features a user-friendly interface and offers both USB-C and secure Bluetooth connectivity for flexible interaction with companion applications and decentralized applications (DApps) within the Hedera ecosystem.
Project Information
Related Projects

HashSea is a dedicated NFT marketplace and launchpad platform operating on the Hedera blockchain network. It provides a space for creators and buyers to mint live, purchase assets on secondary market or create their own NFT assets while engaging with the other digital assets native to the Hedera network.
As a marketplace, HashSea facilitates the discovery, purchase, and sale of Hedera NFTs, leveraging the network's high throughput and remarkably low, predictable transaction fees. Meanwhile, functioning as a launchpad, HashSea empowers creators by offering tools and services to easily mint and debut new projects directly to the Hedera ecosystem. This dual role positions HashSea as a key enabler for both established and emerging artists and developers looking to capitalize on Hedera's efficient, carbon-negative infrastructure.
HashSea’s utilization of the Hedera Token Service (HTS) allows it to offer features embedded features such as native, enforceable royalties for creators and near instant transactions. It supports the HashPack wallet for minting, listing, and trading NFTs on the Hedera blockchain network.

Metacourt is a virtual metaverse platform created in an official partnership with Tennis Australia to extend the fan experience of the Australian Open (AO). It provides a 3D digital recreation of Melbourne Park, the tournament’s physical grounds, allowing a global audience to explore the venue, interact with other fans, and stream live or historic matches from within the metaverse.
The platform leverages the Hedera network to power its digital asset strategy including its central feature, the "AO Art Ball" NFT collection, which consists of thousands of unique NFTs linked to specific 19cm x 19cm plots of the real-world tennis courts. When a winning shot from an official match lands on a plot, the corresponding NFT is updated in real-time with match data, and its owner is rewarded with exclusive utility, such as match footage or merchandise.
Metacourt a novel, gamified experience secured on the Hedera blockchain network to provide fans with verifiable ownership of unique moments in tennis history.

The Managed Guardian Service (MGS) is a SaaS platform built on the open source Hedera Guardian, designed to simplify the creation, management, and verification of digital emissions and carbon offset tokens. It leverages Hedera’s public ledger to ensure that each digital environmental asset, from carbon credits to Renewable Energy Certificate is auditable, traceable, and reproducible, reducing fraud and enhancing sustainability market integrity.
MGS builds on the Guardian’s Policy Workflow Engine and W3C-backed Web3 integrations, offering flexible onboarding (UI and API), real time indexing, analytics, and full lifecycle oversight for tokenised environmental assets. Operated by Envision Blockchain and supported by the Hedera Foundation and Swirlds Labs, MGS enables organisations to streamline carbon accounting, uphold transparent methodologies, and scale climate solutions securely on Hedera’s fast, low energy network.

Oneto11 is a multigenre mobile gaming platform built on the Hedera blockchain network. It features a pioneering social networking fantasy application with a diverse play-to-earn (P2E) ecosystem allowing users to generate income through wins and a deep, multi-layered referral system.
The Oneto11 platform hosts a wide array of games catering to different player preferences. Its core offering includes fantasy sports, where users create virtual teams for real-world matches in cricket, football, and other sports and compete for prizes. It also provides a robust collection of casual mobile games such as Ludo and Fruit Slice, educational quiz games, and immersive RPG and social metaverse experiences featuring non-fungible token (NFT) integration utilizing the Hedera blockchain platform.
A key aspect of Oneto11 is its integrated wallet, native “1TO11” token for ecosystem transactions, and NFT marketplace. Combined, these allow users to creation and trade in-game assets securely as NFTs, particularly within its RPG titles.
