Open-source alternatives to Nullstack

This library provides a unified interface for interacting with hundreds of global cryptocurrency exchanges. It serves as a standardized framework for building automated trading systems, allowing developers to fetch real-time market data, manage account balances, and execute orders across multiple financial platforms through a single, predictable set of methods. The project distinguishes itself by abstracting the complexities of diverse exchange-specific application programming interfaces into a consistent internal schema. It includes a modular authentication layer that automatically handles c

web3.js is a TypeScript development framework and library for integrating applications with the Ethereum blockchain. It serves as an Ethereum JSON RPC library for querying data and sending transactions, a smart contract interface for interacting with on-chain logic, and a wallet integration toolkit for managing private keys. The project provides specialized capabilities for blockchain node communication, enabling the execution of smart contract functions and the management of Ethereum accounts. It includes tools for web3 address resolution to translate human-readable names into machine-readab

Flame is a 2D game engine for Flutter and Dart. It provides a component-based game framework for managing entities and their lifecycles through a hierarchical architecture, alongside a dedicated system for game asset management and input handling. The engine distinguishes itself through a specialized integration layer for external physics engines to handle rigid body dynamics and collision detection. It also features a high-performance task model that uses isolates to offload heavy computations and prevent main thread blocking. The framework covers a broad range of capabilities including vis