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Open Source Database Designs
✓ verifiedFreemium
Online database-design tool with sample schemas and an AI generator to explore, modify or build database structures visually.
👁 27K/mo
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Angular.dev
✓ verifiedFree
Google's open-source TypeScript framework for building scalable web apps, featuring signals, reactivity and first-party tooling.
👁 1.1M/mo
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Castly
✓ verifiedFreemium
AI writing assistant that turns chat conversations and uploaded PDFs into polished, publishable content for creators.
👁 3.4K/mo
Pricing
No public pricing
No public pricing
Free: $0 (5 PDF uploads, 5 published posts)
Pro: $12/mo (unlimited conversations, uploads, posts)
Core features
- ✦Library of sample database designs
- ✦Visual database designer / diagram tool
- ✦AI database generator
- ✦Modify and optimize existing schemas
- ✦SQL script export
- ✦Dialect converters (MySQL/PostgreSQL/MSSQL)
- ✦Signals-based fine-grained reactivity
- ✦Built-in control flow and deferrable views
- ✦Server-side rendering and hydration
- ✦First-party routing, forms and dependency injection
- ✦AI-forward tooling and MCP resources
- ✦In-browser tutorials and playground
- ✦Conversational AI content generation
- ✦Question-answering over uploaded PDFs
- ✦Rich text editor for refining drafts
- ✦One-click publishing and sharing
- ✦Unlimited conversations on all plans
Use cases
- →Finding a starting schema for a project
- →Designing a database visually
- →Generating a schema with AI
- →Converting between SQL dialects
- →Building scalable single-page apps
- →Enterprise web application development
- →Performance-critical front ends
- →Learning modern web development
- →Drafting blog posts and articles
- →Extracting insights from documents
- →Refining and polishing AI drafts
- →Publishing content quickly
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