A curated list of free system design learning materials and interview preparation problems and concepts.
A free, open-source alternative to Burp Suite: an intercepting proxy and web app security testing suite with Repeater, Intruder, Collaborator and a built-in OWASP ZAP scanner. Linux, AGPL-3.0.
This comprehensive CKA learning path repo equips aspiring Kubernetes administrators with all the knowledge and resources to ace the CKA exam on the first try. Includes in-depth explanations, hands-on labs, and valuable study materials. Pass the CKA and unlock your Kubernetes potential today!
ArcadeDB Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.
A tool to help eliminate NullPointerExceptions (NPEs) in your Java code with low build-time overhead
💪 A framework for assisting in the renovation of Android componentization (帮助 Android App è¿›è¡Œç»„ä»¶åŒ–æ”¹é€ çš„è·¯ç”±æ¡†æž¶)
Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.
Provide support to increase developer productivity in Java when using Elasticsearch. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
Provides support to increase developer productivity in Java when using Redis, a key-value store. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
Provides support to increase developer productivity in Java when using MongoDB. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
StackGres Operator, Full Stack PostgreSQL on Kubernetes // !! Mirror repository of https://gitlab.com/ongresinc/stackgres, only accept Merge Requests there.
Provide support to increase developer productivity in Java when using Neo4j. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
Exercism exercises in Java.
INCEpTION provides a semantic annotation platform offering intelligent annotation assistance and knowledge management.
MOA is an open source framework for Big Data stream mining. It includes a collection of machine learning algorithms (classification, regression, clustering, outlier detection, concept drift detection and recommender systems) and tools for evaluation.
Open-source systems management and configuration platform
World Generation through a new Iris
âš¡ Ultra-Low Latency Continuous Double Auction Matching Engine in Java 21 Loom. In-memory L2 market depth, price-time priority, STOMP WebSockets, 50k+ ops/sec.
Java-first open-source handbook for understanding and building agentic systems, one concept at a time.