"AI tool directory" that encompasses all AI tools available. However, there are various resources and platforms that curate and provide information about AI tools, frameworks, libraries, and software. These resources can be useful for researchers, developers, and organizations looking to explore and adopt AI technologies. Keep in mind that the landscape of AI tools is constantly evolving, and new tools may have emerged since my last update.

Here's a general description of what you might find in an AI tool directory:

Framework and Libraries: Lists of popular AI frameworks and libraries used for machine learning and deep learning. Examples include TensorFlow, PyTorch, scikit-learn, Keras, and MXNet.

Model Zoo: Repositories that host pre-trained models across various domains, allowing users to leverage existing models for their specific applications.

Data Annotation Tools: Tools designed to assist in labeling and annotating datasets for training machine learning models. These tools are crucial for supervised learning tasks.

Development Environments: Platforms or integrated development environments (IDEs) that facilitate the development and deployment of AI applications. Examples include Jupyter Notebooks, Google Colab, and Microsoft Azure Notebooks.

AI Research Papers and Publications: Collections of research papers and publications in the field of artificial intelligence. This can be valuable for staying updated on the latest advancements and methodologies.

AI Marketplaces: Platforms where users can find, buy, or sell AI models and services. These marketplaces may also provide APIs for integrating AI capabilities into applications.

AI Hardware: Information about hardware accelerators and specialized processors designed for AI workloads, such as GPUs (Graphics Processing Units), TPUs (Tensor Processing Units), and FPGAs (Field-Programmable Gate Arrays).

Community and Forums: Sections where users can engage in discussions, ask questions, and share knowledge about AI tools and applications. This might include forums, online communities, and social media groups.

Tutorials and Documentation: Resources that provide tutorials, documentation, and educational materials to help users learn how to use specific AI tools effectively.

AI Tool Comparisons: Comparative analyses of different AI tools, frameworks, or libraries, helping users make informed decisions based on their specific requirements.

It's advisable to check the latest online resources, community forums, and technology-related websites for the most up-to-date information on AI tools and directories.