For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

BCC - Tools for BPF-based Linux IO analysis, networking, monitoring, and more

Embedded web server, with TCP/IP network stack, MQTT and Websocket

AddressSanitizer, ThreadSanitizer, MemorySanitizer

H2O - the optimized HTTP/1, HTTP/2, HTTP/3 server

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Modern transactional key-value/row storage library.