7 new open source AI tools you need right now…

TL;DR

Seven open-source tools help developers build better AI agent pipelines by handling roles, prompt testing, prediction, UI, memory, and model training.

Key Points

• 1.The Agency provides ready-made agent templates for startup roles (frontend dev, security engineer, growth hacker) that plug directly into Claude Code to skip manual skill-building.
• 2.Prompt Fu (recently acquired by OpenAI) acts as a unit-testing framework for prompts, letting you benchmark different models and run automated red-team attacks to catch prompt injection vulnerabilities.
• 3.Open Viking is an agent-specific database that organizes memory, resources, and skills into a tiered file system instead of a vector DB, reducing token consumption and auto-compressing long-term memory.
• 4.Nano Chat lets you train your own small language model end-to-end — tokenization through fine-tuning and a web UI — for roughly $100 in GPU costs.