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Tool
Category
Pricing
Free?
Updated
Aider
AI Coding
Free
✓
Mar 2026
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Open-source terminal AI pair programmer with git integration and multi-LLM support.
Best for: coding
CORE
AI Research
Free
✓
Mar 2026
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World's largest open access paper aggregator with 250M+ records and text mining API.
Best for: open-access
Unpaywall
AI Research
Free
✓
Mar 2026
→
Free browser extension that finds legal open access versions of paywalled papers.
Best for: open-access