RAG systems enable AI models to access external databases or documents during response generation, improving retrieval speed and accuracy. Tools like LangChain, Galileo's GenAI Studio, OpenAI GPT-3.5, Hugging Face Transformers, OpenAI Codex, Rasa, Dialogflow, Microsoft Bot Framework, IBM Watson Assistant, and T5 offer strong capabilities for building effective RAG systems. When selecting tools, consider retrieval speed, response accuracy, and system scalability to optimize the development process. Integrating these tools can be complex, but platforms like GenAI Studio provide a user-friendly experience and practical solutions for users seeking comprehensive platforms.