useful AI tools

 Listing **all** AI tools would be an immense task due to the constant evolution and emergence of new technologies. However, I can provide an extensive list of notable AI tools across multiple categories. Please note that this list is not exhaustive but captures a wide range of popular and useful AI tools available as of 2023.

### General AI Services & Platforms
1. **Google AI Platform**
2. **IBM Watson**
3. **Microsoft Azure AI**
4. **AWS AI Services**
5. **Databricks**
6. **H2O.ai**
7. **Alteryx**
8. **C3.ai**

### Natural Language Processing (NLP)
1. **SpaCy**
2. **NLTK (Natural Language Toolkit)**
3. **Hugging Face Transformers**
4. **TextRazor**
5. **DeepAI GPT-3/ChatGPT**
6. **Amazon Comprehend**
7. **Google Natural Language API**
8. **IBM Watson Natural Language Understanding**

### Machine Learning Frameworks
1. **TensorFlow**
2. **PyTorch**
3. **Keras**
4. **Scikit-learn**
5. **Apache MXNet**
6. **LightGBM**
7. **XGBoost**
8. **Fastai**

### Data Analysis & Visualization
1. **Tableau**
2. **Power BI**
3. **Looker**
4. **Apache Superset**
5. **Qlik**
6. **D3.js**
7. **Matplotlib (Python Library)**
8. **Seaborn (Python Library)**
9. **Plotly**

### Computer Vision
1. **OpenCV**
2. **TensorFlow Lite**
3. **YOLO (You Only Look Once)**
4. **Faster R-CNN**
5. **Detectron2**
6. **EasyOCR**
7. **Clarifai**
8. **Google Vision AI**

### Chatbots & Conversational AI
1. **Dialogflow**
2. **Microsoft Bot Framework**
3. **Rasa**
4. **ManyChat**
5. **Chatfuel**
6. **IBM Watson Assistant**
7. **Tidio**
8. **Zendesk Chat**

### Robotics & Automation
1. **ROS (Robot Operating System)**
2. **UiPath**
3. **Blue Prism**
4. **Automation Anywhere**
5. **WorkFusion**
6. **Pega**
7. **Kofax**
8. **ABB Robotics**

### Image & Video Generation
1. **DALL-E**
2. **Stable Diffusion**
3. **Midjourney**
4. **Runway ML**
5. **DeepArt**
6. **Artbreeder**
7. **Pikazo**
8. **This Person Does Not Exist**

### Audio & Music Generation
1. **AIVA**
2. **Amper Music**
3. **OpenAI Jukedeck**
4. **Sonantic**
5. **Melody Scanner**
6. **Descript**
7. **Soundraw**
8. **Landr**

### AI Ethics & Monitoring
1. **Fiddler AI**
2. **DataRobot**
3. **Aequitas**
4. **IBM Watson OpenScale**
5. **H2O Driverless AI**
6. **Fairness Indicators (TensorFlow)**
7. **What-If Tool (Google)**
8. **AI Fairness 360 (IBM)**

### Other Specialized Tools
1. **Alphafold** - Protein folding prediction.
2. **DeepMind** - Various research projects in AI.
3. **DeepAI Codex** - Code generation from natural language.
4. **Meta's PyTorch Geometric** - For graph deep learning.
5. **Frictionless Data** - Data packaging and integration.
6. **Lobe** - Visual tool for building custom machine learning models.
7. **Google Cloud AutoML** - Tools for building custom ML models with minimal coding.

### AI for Business Intelligence
1. **Qlik Sense**
2. **TIBCO Spotfire**
3. **Sisense**
4. **Domo**
5. **Mixpanel**

### AI for Healthcare
1. **PathAI** - Diagnostic tools using machine learning.
2. **Tempus** - Data-driven precision medicine.
3. **Zebra Medical Vision** - Medical imaging AI.
4. **Aidoc** - AI radiology solutions.

### AI for Finance
1. **ZestFinance**
2. **Kensho**
3. **Numerai**
4. **Ayasdi** - AI for risk assessment in financial institutions.

### AI for Marketing
1. **Persado**
2. **Phrasee**
3. **Crimson Hexagon**
4. **HubSpot**
5. **Optimove**

### AI in Gaming
1. **DeepAI Five**
2. **Unity ML-Agents**
3. **DeepMind's AlphaStar**

This list provides a comprehensive overview of well-known AI tools and applications across diverse fields. Remember that advancements in AI are rapid, leading to frequent updates, new entrants, and improvements in existing technologies. If you're looking for something specific or in a particular area, feel free to ask!