Flowise
flowiseai.com
Open-source drag-and-drop builder for creating LLM applications — RAG pipelines, chatbots, agents, and API integrations with no coding required.
Why it is useful
Flowise lets you visually connect LLMs, vector stores, memory systems, and tools into a working AI application. Self-hostable for free, with support for dozens of LLM providers and vector databases. Ideal for building internal tools, document Q&A bots, or AI prototypes without writing LangChain code by hand.