✓
Tool
Category
Pricing
Free?
Updated
Obsidian ✓
AI Productivity
Freemium
✓
Mar 2026
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Local-first knowledge base with AI plugins for second brain building
Best for: note-taking
AskYourPDF
AI Research
Freemium
✓
Mar 2026
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AI PDF assistant with ChatGPT plugin integration and batch document processing.
Best for: PDF
Kestra
AI Automation
Freemium
✓
Mar 2026
→
Open-source YAML-based declarative workflow orchestration with event-driven architecture.
Best for: orchestration