Polkascan

Polkadot Multi-chain Block Explorer
Polkascan is part of WEB3SCAN and offers real-time multi-chain data. WEB3SCAN makes blockchain data accessible, understandable and suitable for business intelligence and advanced analytics, powering fact-based decision support.
  • Polkadot
  • Project
  • Explorer
  • UI/UX
  • Tools & Utilities
  • Data
  • Analytics

OrbitDB

Peer-to-Peer Databases for the Decentralized Web
OrbitDB is a serverless, distributed, peer-to-peer database. OrbitDB uses IPFS as its data storage and IPFS Pubsub to automatically sync databases with peers. It’s an eventually consistent database that uses CRDTs for conflict-free database merges making OrbitDB an excellent choice for decentralized
  • General
  • Project
  • Infrastructure
  • Data
  • IPFS

eth.events

Access Ethereum data as SQL, ElasticSearch and GraphQL
Reach your goals with blockchain data much faster, cheaper and with maximum flexibility. No need to run a full archive node or your own database if you just want to use blockchain data .
  • Ethereum
  • Project
  • Data
  • API
  • Network
  • Testnet
  • Dev tools
  • Oracle

Provable (oraclize)

Blockchain oracle for modern DApps.
Oraclize is the leading oracle service for smart contracts and blockchain applications, serving thousands of requests every day on platforms like Ethereum , Rootstock , R3 Corda , Hyperledger Fabric and EOS .
  • General
  • Multi Chain
  • Platform agnostic
  • Project
  • Oracle
  • Data
  • Dev tools
  • API
  • Smart Contract
  • Solidity

Delphi System

The oracle Platform
For smart contracts, the oracle is the source of truth. Use our frameworks to decentralize this power.
  • Ethereum
  • Project
  • Oracle
  • Data
  • API
  • Dev tools
  • Earn

Contribute Code

Help build Frontend, Backend and APIs.
We need your help in fixing issues, testing in multiple browsers or take PR if you have new features to add.   
  • Guide
  • Code
  • API
  • Data
  • Documentation
  • Testing
  • Minds

Etherscan

Etherscan is a Block Explorer and Analytics Platform for Ethereum
  • Ethereum
  • Project
  • Explorer
  • Analytics
  • API
  • Data
  • IDEs
  • Dev tools
  • Exchanges

Oracle mining for Tellor

Help build mining and help mining.
Contribute to our future plans to implement a GPU miner(not built in python), provide a way to pay in Ether for data, and improve our reward/incentives mechanism. @todo Get more detail about mining. 
  • Guide
  • Mining
  • Mining
  • POS
  • Oracle
  • Data
  • API
  • Earn
  • Tellor

Tellor

The Decentralized Oracle
The Standard Oracle For Decentralized Finance. An easy to implement solution to get high value data into your smart contracts. Get API Data Into Your Ethereum Contracts. By providing the adaptive infrastructure for smart contracts to query, on demand, off-chain data on-chain by properly
  • Ethereum
  • General
  • Project
  • Oracle
  • Data
  • API
  • Mining
  • DeFi
  • Earn
  • POS

Realitio

Crowd-sourced verification for smart contract oracles.
Realitio provides a flexible mechanism for verifying real-world events for smart contracts.
  • Ethereum
  • Project
  • Oracle
  • Data
  • API
  • Smart Contract
  • Framework

Atra Blockchain

Drag and drop IDE to build Ethereum Dapps
The easiest way to build an Ethereum application. Create a decentralized application in minutes. Start building today. No code required. Features No Developer Required : Create an end-to-end application with our interface No Cryptocurrency Required : We manage transactions for you Rapidly Prototype
  • Ethereum
  • Project
  • IDEs
  • Smart Contract
  • Framework
  • Oracle
  • UI/UX
  • Data
  • API
  • Infrastructure
  • Dev tools
  • Tools & Utilities

Create Oracles on zap

Create Oracles and get paid
Once you’ve entered into our ecosystem, you can manage everything. Anyone with a smartphone and an internet connection can participate in Zap's global platform.
  • Guide
  • Oracle
  • Earn
  • Network
  • Mining
  • Data
  • API
  • Zap

Zap

Oracles That Bring Data to Smart Contracts
The Zap platform allows users to create, publish and subscribe to smart contract and Decentralized Application compatible data feeds. Data Speculators can also bond zap for dots and choose to redeem dots.
  • Ethereum
  • Project
  • Oracle
  • API
  • Data
  • Smart Contract
  • Earn
  • Trading

Witnet

A Decentralized Oracle Network connecting smart contracts to the rest of the world.
Witnet is a decentralized oracle network that connects smart contracts to the outer world. It aims to allow any piece of software to retrieve the contents published at any web address with complete and verifiable proof of its integrity and without blindly trusting any third party.
  • Ethereum
  • Platform agnostic
  • Project
  • Oracle
  • Smart Contract
  • Data
  • API

Augur

Prediction market protocol built on Ethereum
Augur is a trustless, decentralized oracle and prediction market. Individuals can speculate on the outcome of future events, those who forecast correctly win money and those that forecast incorrectly lose money. Augur was founded in 2014 and officially launched on the Ethereum mainnet on July 2018.
  • Ethereum
  • Project
  • Prediction Markets
  • Oracle
  • Data

Helena

Prediction markets platform for forecasting blockchain developments, events, and projects
Helena transforms fragmented community insights into real-time consensus data signals covering major technology, regulatory and business events and KPIs in the blockchain and crypto space. Helena’s mission is to provide a simple way for investors to stay up-to-date and make the best decisions
  • Ethereum
  • Project
  • Derivatives
  • Oracle
  • Data
  • Prediction Markets

De-Fi Pulse

A decentralized finance live tracker Dashboard
@todo
  • Ethereum
  • Project
  • Analytics
  • UI/UX
  • Data

Alethio

Blockchain data, analytics, and visualization platform with Core API product & analytics tool suite
Make Ethereum data work for you Alethio is a powerful blockchain data, analytics & visualization platform. We recently released our Core API product & Alethio Analytics tool suite for Ethereum!
  • Ethereum
  • Project
  • Analytics
  • API
  • UI/UX
  • Tools & Utilities
  • Explorer
  • Infrastructure
  • Academic
  • Data

Infura

Access Ethereum via REST API
Our easy to use API and developer tools provide secure, reliable, and scalable access to Ethereum and IPFS. We provide the infrastructure for your decentralized applications so you can focus on the features.
  • Ethereum
  • Project
  • Infrastructure
  • API
  • Network
  • Dev tools
  • Data

Rhombus Network

Connect your smart contract with real-world data.
Rhombus is the oracle solution for your smart contract We provide the most reliable, credible, and efficient oracle platform on the planet. Access over five trillion real-world data points, custom off-chain computing, and the best security the industry has to offer.
  • Ethereum
  • Project
  • Oracle
  • Dev tools
  • Data
  • API
  • Infrastructure
  • Framework

Streamr

Realtime Data trading Platform.
Streamr is creating an open source platform for the free and fair exchange of the world’s real-time data. Our blockchain-backed data Marketplace and powerful tools put your data back where it belongs – with you.
  • Ethereum
  • Project
  • Marketplaces
  • Exchanges
  • Trading
  • Data

TruSet

Multi-sided marketplaces that collect, validate, publish, and commercialize business-critical reference data.
TruSet is creating n-sided marketplaces for users to collect, validate, publish, and commercialize business-critical data without the intervention of vendors or service providers. As a community-operated resource, TruSet can better ensure quality and accuracy because validators of the data are
  • Ethereum
  • Project
  • Marketplaces
  • Data
  • Earn
  • Network
  • Infrastructure
  • Framework