Free AI Tools

DBpedia extracts structured data from Wikipedia into RDF. 500M+ facts extracted. SPARQL endpoint for querying. Links to other knowledge bases. Openly licensed data. Community-driven.

Freebase is a large collaborative knowledge base. Now part of Google Knowledge Graph. CC licensed, freely available for download. Groundtruth for knowledge graph research. 43M+ entities extracted.

Apache Giraph processes large graphs on Hadoop clusters. Bulk Synchronous Parallel (BSP) model. Gimel connectors to data sources. Iterative graph algorithms. Used by Facebook and Yahoo.

GQL is a standardized graph query language (ISO/IEC 39075). Successor to Cypher. Multi-vendor support planned. Early adoption by industry players. Will unify graph query ecosystem.

Apollo Client, Relay, and Hasura provide GraphQL tooling. Schema stitching and federation. Caching strategies for performance. Widely adopted for modern APIs. Mature ecosystem.

GraphQL is a query language for APIs. Apollo Federation combines multiple graphs. Subgraphs managed independently. Entity references across graphs. Standard for modern API design.

Memgraph is an in-memory graph database with millisecond query latency. Full ACID transactions. High availability via replication. Bolt protocol compatible with Neo4j tools. Enterprise version adds monitoring and backups.

NetworkX is a Python library for complex network analysis. Build, analyze, visualize graphs. 100+ algorithms (shortest path, centrality, community detection). Integration with Matplotlib for drawing. Research standard.

RedisGraph adds graph database capabilities to Redis. Fast in-memory processing. Cypher queries. Sub-millisecond results. Ideal for real-time recommendations. Open-source module.

Wikidata is a free and open knowledge base with 100M+ structured items. Community-edited facts and relationships. SPARQL endpoint for querying. Powers Wikipedia and other sites. Public domain data.

APISIX is an open-source cloud-native API gateway. Dynamic routing and plugin loading. Multi-protocol support (HTTP, gRPC, Dubbo, WebSocket). Metrics exported to Prometheus. Helm chart for Kubernetes. Growing adoption in China.

Caddy is a web server with automatic HTTPS via Let's Encrypt. Caddyfile syntax is intuitive. Reverse proxy with health checks. Can be extended via plugins. Single binary. Used in development and production.

eBPF programs run safely in the Linux kernel. Monitor system calls, network, disk. No recompile needed. Used by Cilium, Falco, and Pixie for observability. New programming model transforming Linux infrastructure.

Envoy is a L7 proxy and communication bus for microservices. Dynamic service discovery. Advanced load balancing (ring hash, maglev). Connection pooling and circuit breaking. Typed metadata propagation. Foundation for Istio service mesh. Used by Lyft, Google, Amazon.

HAProxy provides high-performance load balancing and reverse proxying. SSL/TLS termination with SNI. Health checks and backend switching. Stick tables track sessions. No dependencies. Deployed at 100,000+ companies. Extreme reliability.

Kyverno enforces policies on Kubernetes resources via simple YAML rules. Mutate: auto-add image pull secrets. Validate: reject images from untrusted registries. Generate: auto-create RBAC for new namespaces. CNCF project. Alternative to OPA Rego.

NGINX Ingress Controller exposes Kubernetes services via HTTP/HTTPS. Terraform and Helm deploy easily. Rewrite and regex support. SSL/TLS termination. WebSocket passthrough. High performance at scale. Stable upstream from NGINX Inc.

Spring Cloud Gateway is a lightweight API gateway framework for Java applications. Route by hostname, path, query parameters. Rate limiting and circuit breaker patterns. Built-in testing with MockRestServiceServer. Easy to extend with custom filters.

Traefik is a modern reverse proxy and load balancer. Kubernetes native: auto-discovers services from labels. Dynamic HTTPS with Let's Encrypt. Circuit breaker and retry logic. Prometheus metrics built-in. Open-source and fast.

ArgoCD automates Kubernetes deployments by watching Git repositories. Change a YAML file. ArgoCD syncs the cluster. Multi-cluster support manages 100+ environments. Health status and diff views prevent drift. RBAC per repo. Graduated CNCF project, used by Netflix and Tesla.