Developer-Builder-Tools

Highlights

Web3j is the Java and Android integration library for Ethereum. Created in 2016, and still going strong in 2025 it is core plumbing to Ethereum for one of the world's most widely used development platforms, the JVM. It has been downloaded millions of times, and is used by everyone including Enterprises such as J.P. Morgan, Fnality and NTT Data Web3 infrastructure companies such as Alchemy The Besu Ethereum Execution client It's even been integrated natively into the Android OS by Freedom Factory in ethOS which powers the upcoming Ethereum phone the DGEN1 We decided in 2024 to bring Web3j into the Hyperledger Foundation, which provides high-quality governance of open source (similar to the Apache Foundation). It's still, the same team at Web3 Labs responsible for maintaining and supporting the library for its wide and varied user base. The Hyperledger association is great for visibility, but doesn't provide any funding for the project! We rely on grant funding to sustain this library and hopeful to qualify for this RPGF round. Unfortunately, we missed out on OP RPGF 3 as we had not realised projects were eligible for multiple rounds so did not apply following our success in OP RPGF 2. 🙏🏻

Client-Bibliotheken & SDKs (Frontend)

Web3j

Governance · CLI

Passport is the premier web3 native offering that enables ecosystems to protect, understand and organically grow what matters most – their communities. We see Passport at the confluence of a best in class identity solution, backed by the most relevant and comprehensive data analysis toolset that also offers communities the ability to ascribe reputation.

Daten, Analyse & Tracing

Passport XYZ | Gitcoin Passport

Analysen · Gas-effizient

miniapp starters is a set of open-source starter templates designed to make it easier to build Farcaster miniapps, with support for Worldcoin integrations as well. Miniapp Starters came out of our own journey building miniapps. Along the way, we found ourselves creating common patterns and components repeatedly, so we decided to turn that work into a set of reusable, community-friendly templates. Now, anyone can kickstart their own miniapp projects without reinventing the wheel.

Bildungs- & Community-Ressourcen

miniapp starters

Bildung · Farcaster · Next.js · TailwindCSS · Typsicher · Analysen

Anwendungen

Cross-Chain & Interoperabilität

LI.FI

Cross-Chain · API · DEX-Aggregator · Multi-Chain · Leistungsoptimierung

L2Pass

Cross-Chain · Wallet · Multi-Chain

OP ENS Gateway by Opti.Domains

Cross-Chain · Governance · Ebene 2 · Verifizierung · Skalierbarkeit

Titan Layer

Cross-Chain · Sicherheit

Stargate Finance

Cross-Chain · DeFi

Transaktions- & Wallet-Infrastruktur

LlamaPay

DeFi · Gas-effizient

Candide's Smart Account Contracts

Wallet · Governance · Bildung · Kontoabstraktion · Benutzererfahrung

Curvegrid MultiBaas

DeFi

ethereum-multicall

Multicall

Governance Onchain Paymaster

Kontoabstraktion · Developer Experience

Daten, Analyse & Tracing

Blockhead

Block Explorer

Blockscout open-source block explorer

Block Explorer · Chains

Patterns wallet analytics & CRM

Analysen · DeFi · Visualisierung · Docker · Skalierbarkeit

Ethereum RPC MCP Server

MCP-Server · Vertragsverifizierung

Ethernal

Analysen · Block Explorer · Chains · Vertragsverifizierung · CLI

Bildungs- & Community-Ressourcen

ERC-4337 Documentation

Kontoabstraktion · Bildung · page-developers-tools-tag-standards-and-specifications

Academy

Bildung

Ethereum MCP

MCP-Server · page-developers-tools-tag-standards-and-specifications

The Ethernaut

Bildung · Sicherheit · Solidity · Community-gesteuert · React-App

Ethereum EIPs Ontology

Bildung · page-developers-tools-tag-standards-and-specifications

Client-Bibliotheken & SDKs (Frontend)

Black Scholes library/compiler - go and rust

DeFi · Gas-Optimierung

evmstate

Analysen · Speicherlayout

go-libp2p

Governance · libp2p · Peer-to-Peer · Vernetzung · Verschlüsselung · GossipSub · Community-gesteuert

Gelato Relay SDK

Sicherheit · SDK

Frames.js

Frontend · Farcaster · React · Next.js

Smart-Contract-Entwicklung & Toolchains

Hermes - a GossipSub listener and tracer for libp2p-based networks.

Governance · GossipSub · libp2p · CLI

Farcaster Attestation

Governance · Solidity · Farcaster

EvmTools

CLI · Analysen · Debugging-Werkzeuge · Transaktionsdekodierung · Merkle-Trees

AWS KMS and YubiHSM signer for OP Stack

Sicherheit · Docker · Transaktionssignierung

foundry-storage-check

Foundry · CLI · DevOps · GitHub Actions · Solidity · Speicherlayout · Code-Qualität · Sicherheit

Sicherheit, Testing & formale Verifizierung

blocksmith.js

CLI · Foundry · Cross-Chain · Vertragsbereitstellung

Chimera

Foundry · Solidity · Code-Abdeckung · Testautomatisierung · VSCode-Erweiterung

Wallet Test Framework

Testing · Wallet · Benutzererfahrung · Developer Experience · Sicherheit

Kontrol - formal verification tool based on Foundry and KEVM

Foundry · Bildung · Governance · Formale Verifizierung · Solidity · Laufzeitverifizierung · Vertragsbereitstellung · Statische Analyse

Trail of Bits Skills Marketplace

Sicherheit · Testing · page-developers-tools-tag-agent-skills

Anwendungskategorien

Cross-Chain & Interoperabilität

Werkzeuge, die Messaging, Asset-Transfers und Shared State über das Ethereum Mainnet, Rollups und andere Blockchains hinweg ermöglichen.

Transaktions- & Wallet-Infrastruktur

Infrastruktur zum Erstellen, Signieren, Senden, Simulieren und Verwalten von Ethereum-Transaktionen und Wallets.

Daten, Analyse & Tracing

Indexierungs-, Abfrage-, Analyse- und Tracing-Werkzeuge für On-Chain-Daten, Ausführungen und Netzwerkaktivitäten.

Bildungs- & Community-Ressourcen

Lernmaterialien, Dokumentation, Tutorials und Community-Plattformen für Ethereum-Builder.

Client-Bibliotheken & SDKs (Frontend)

Sprachspezifische Bibliotheken und SDKs zur Interaktion mit Ethereum-Nodes, -Verträgen und -Protokollen.

Smart-Contract-Entwicklung & Toolchains

Frameworks und Werkzeuge zum Schreiben, Testen, Bereitstellen und Aktualisieren von Smart Contracts.

Sicherheit, Testing & formale Verifizierung

Werkzeuge für Auditing, Testing, Fuzzing und Verifizierung zur Verbesserung der Sicherheit und Korrektheit von Smart Contracts.