parquet

CNEquity

+74

开源中国股市（A股）本地数据湖，面向量化研究与回测：股票行情、财务数据、期货、资金流向、公告、指数行业、宏观，55 个日更数据集，复权与历史成分内置，行级溯源、PIT 语义，MCP 原生，让 AI 直接查 A 股。免注册、免 Token，自托管。Open-source China A-share stock data lake for quant research, backtesting and AI agents.

apache/arrow

+30

Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

questdb

+17

QuestDB is a high performance, open-source, time-series database

solace-nisshi

+11

Apache Kafka® compatible broker with S3, PostgreSQL, SQLite, Apache Iceberg and Delta Lake

rilldata/rill

+10

The fastest business intelligence tool for humans and agents.

arrow-rs

+8

Official Rust implementation of Apache Arrow

ClickBench

+8

ClickBench: a Benchmark For Analytical Databases

Daft

+8

High-performance data engine for AI and multimodal workloads. Process images, audio, video, and structured data at any scale

lakehq/sail

+7

Drop-in Apache Spark replacement written in Rust, unifying batch processing, stream processing, and compute-intensive AI workloads.