
Hedera Coinflip
Hedera Coinflip is a decentralized application (dApp) built on the Hedera network that offers a simple, "double or nothing" style betting game. Users can wager HBAR for a 50/50 chance to double their bet. The platform's core value proposition lies in its commitment to transparency and fairness, which is achieved through its unique use of the Hedera Consensus Service (HCS).
The fairness of each flip is guaranteed by a provably fair mechanism that prevents manipulation by either the player or the platform operator. When a user initiates a flip, a combination of a server-provided seed and a client-provided seed is submitted to the Hedera network via HCS. The immutable and unpredictable consensus timestamp assigned to this transaction by the decentralized network is then used to determine the outcome. Because this timestamp cannot be influenced or known in advance, the result of the coin flip is truly random and publicly verifiable.
A small percentage of each wager contributes to a progressive jackpot, which can be won by players who achieve a specific, consecutive number of wins. This jackpot serves as the platform's primary revenue model while also creating an exciting, high-reward target for dedicated players.
Project Information
Related Projects

Meta Carbon is a climate-tech company founded dedicated to making carbon offsetting more transparent, efficient, and engaging. Its mission is to simplify carbon management for businesses and individuals, using technology to bridge the gap between climate action and everyday life.
The core of Meta Carbon's service is its software-as-a-service (SaaS) platform, which provides a comprehensive suite of tools for carbon project management. These include features for inventory management, real-time reporting, and yield optimization. The platform also offers a range of engagement tools, such as offset certificates, digital badges, and leaderboards, which allow businesses to transparently showcase their sustainability efforts to their customers. A key feature of the platform is its ability to integrate with e-commerce sites, enabling carbon offsetting at the point of sale.
Meta Carbon uses the Hedera Consensus Service (HCS) to record every transaction, measurement, and retirement of carbon credits on the public ledger. This provides a high level of transparency and trust, as all data is immutable and auditable.

Calaxy is a decentralized social marketplace designed to empower creators by giving them direct ownership of their communities and monetization tools. It was cofounded by Spencer Dinwiddie, an active NBA player currently with the Dallas Mavericks, and CEO Solo Ceesay.
The Calaxy platform operates on the Hedera blockchain network with additional support for the Solana blockchain. It enables creators to build personalized mini-applications for users called "Worlds" and has been used by scores of celebrities including NFL superstar Ezekiel Elliot, WWE superstar Mickie James, and pop singer Teyana Taylor.
The customizable Worlds serve as social hubs enabling direct fan engagement through features including social feeds, exclusive content, video calls, and NFT sales. Creators can set their own prices for experiences and subscriptions, eliminating the need for intermediaries.
Calaxy integrates a user-friendly wallet supporting fiat currency, cryptocurrencies, and NFTs, Its native token, $CLXY, serves as a gas and governance token for its underlying "Creator's Galaxy" protocol which allows fans to purchase creator-specific tokens that are redeemable for bespoke interactions and unique content.

OneSpan is a Web3 platform that offers a dedicated eClosing solution designed to digitize and secure the entire lifecycle of high-value digital agreements, particularly in the mortgage and lending industries. The platform streamlines the closing process by enabling remote online notarization (RON), electronic signatures, and identity verification, all within a secure and compliant digital environment. A central component of this solution is the OneSpan eVault, a specialized repository for managing the authoritative copy of critical digital documents, such as promissory notes (eNotes).
To provide an unparalleled level of trust and auditability, OneSpan has integrated its platform with ProvenDB, a data integrity service built on the Hedera network. When a document is signed or a key milestone is reached in the eClosing process, a cryptographic fingerprint (hash) of the agreement is anchored to the Hedera public ledger. This action, facilitated by ProvenDB, creates a permanent and immutable timestamped record on the Hedera Consensus Service (HCS).

HGraph Punks is a non-fungible token (NFT) project built on the Hedera network under developer Turtle Moon. It has been active in the HBAR NFT space since 2021. The project draws thematic inspiration from the widely recognized pixelated "Punks" style of profile picture (PFP) collectibles.
A significant feature of HGraph Punks is its point system that utilizes the Hedera Consensus Service (HCS). This system enables mainnet-auditable leaderboards, with points directly linked to the NFTs. This allows holders to earn, track, and engage in a competitive and transparent manner. The project also supports NFT staking, where users can stake their HGraph Punks to accumulate points.
HGraph Punks and its parent entity, Turtle Moon, actively contribute to the Hedera ecosystem through community endeavors and the development of open-source Hedera Consensus Service (HCS) tools. Additionally, HGraph Punks has collaborated on community-focused initiatives such as "Liftoff," presented as a virtual music venue and social environment within the Hedera ecosystem.
