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/tools · Curated Resources

Tools we use. Tools we trust.

Not a generic directory. These are the platforms, calculators, and references we actually use on a regular basis (or have tested enough to trust). If something isn’t on this list, it’s either because we haven’t evaluated it yet or because we did and weren’t impressed.

Our Guides & Tools
📋
AI Prompt Engineering Reference CardsEG3
Free downloadable cheat sheets for developers and builders.
📚
EG3 Guides LibraryEG3
Deep-dive technical guides on embedded systems, DSP, and consumer tech.
Cost & Permit Calculators
💰
PermitCalculator.com
Building permit fee database. 29 cities, verified from published municipal fee schedules.
Developer & AI Platforms
🤖
OpenAI Platform
GPT-4, DALL-E, Whisper APIs. The most widely adopted AI platform.
🧠
Anthropic Console
Claude API access. Strong at reasoning, analysis, and long-context tasks.
🤗
HuggingFace
Open-source model hub. Thousands of pre-trained models and datasets.
✨
Google AI Studio
Gemini API playground. Multimodal, long-context, grounded generation.
Hardware & IoT Resources
⚙️
Arduino
Open-source electronics platform. The gateway to embedded development.
🔧
PlatformIO
Professional embedded development IDE. ESP32, STM32, and 800+ boards.
📡
ESP32 Documentation
ESP32 technical docs. The chip inside most DIY smart home devices.
🍓
Raspberry Pi
Single-board computers. Prototyping, edge computing, home automation.
☀️
NREL Solar Data
National Renewable Energy Lab. Solar resource data and research.