Shattered Pixel Dungeon is an open-source traditional roguelike dungeon crawler with randomized levels and enemies, and hundreds of items to collect and use. It's based on the source code of Pixel Dungeon, by Watabou.
Heritrix is the Internet Archive's open-source, extensible, web-scale, archival-quality web crawler project.
Apache Nutch is an extensible and scalable web crawler
Easy to use lightweight web crawler(易用的轻量化网络爬虫)
Internet search engine for text-oriented websites. Indexing the small, old and weird web.
NewPipe's core library for extracting data from streaming sites
一个简单、敏捷、分布式的支持SpringBoot的Java爬虫框架;An agile, distributed crawler framework.
Free database schema discovery and comprehension tool
Elasticsearch File System Crawler (FS Crawler)
Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.
A scalable, mature and versatile web crawler based on Apache Storm
Java API For Chrome and Firefox