An AI prompt optimizer for writing better prompts and getting better AI results.

A collective list of free APIs

SmartEngine is a lightweight business orchestration engine.

The most comprehensive database of Chinese poetry 🧶最全中华古诗词数据库, 唐宋两朝近一万四千古诗人, 接近5.5万首唐诗加26万宋诗. 两宋时期1564位词人，21050首词。

Java 面试 & 后端通用面试指南，覆盖计算机基础、数据库、分布式、高并发、系统设计与 AI 应用开发

A powerful flow control component enabling reliability, resilience and monitoring for microservices. (面向云原生微服务的高可用流控防护组件)

帮助了解和控制应用

输入SQL，输出索引优化建议

A meticulous HTTP client for the JVM, Android, and GraalVM.

Collection of reusable tested Java code snippets

Java资源大全中文版，包括开发库、开发工具、网站、博客、微信、微博等，由伯乐在线持续更新。

MySQL 资源大全中文版，分析工具、备份、性能测试、配置、部署、GUI 等

Placement driver for TiKV

Distributed transactional key-value database, originally created to complement TiDB

TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastruc…

Free and Open Source, Distributed, RESTful Search Engine

Cassandra river for Elastic search.