
Innovate freely with a huge library of free AI generators.
Innovate freely with a huge library of free AI generators.
CalcForge records 31,360 monthly visits with -4.8% month-over-month growth and Free, Paid pricing. Open Apps records 55,880 monthly visits with +6.1% growth and Free pricing.
Open-source engineering calculators for civil and structural design
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | calcforge.com | openapps.pro |
| Pricing Model | Free, Paid | Free |
| Monthly Visits | 31.36K (31,360) | 55.88K (55,880) |
| MoM Traffic Delta | -1.56K (-4.8%) | +3.24K (+6.1%) |
| Primary Market & Share | 🇮🇳 India (16.1%) | 🇫🇷 France (8.7%) |
| Direct Visits / mo | 12.46K | 22.97K |
| User Rating | 4.3 | 4.3 |
| Supported Platforms | Website | Website |
Open-source engineering calculators for civil and structural design
Structural, geotechnical, tunnelling and contractor tools available free and open source on GitHub.
Searchable construction datasets covering high-rise buildings, bridges, tunnels, dams and housing.
Registered users get calculation workings, bending/shear/deflection diagrams and PDF export.
Four project-based pathways in Python, AI for construction, AI governance and building AI agents.

Independently scored open-source alternatives to paid SaaS
Every app and package receives independent repo-health, technical and dependency-health ratings with a published methodology.
Browse by the commercial product you want to replace — Notion, Firebase, Vercel, Slack, Salesforce and hundreds more.
Developer tools, AI development and agents, databases, DevOps, monitoring, analytics, CMS, CRM, productivity and dozens of other categories.
Original reports plus aggregate data on GitHub stars, contributors and how many SaaS products the catalogue replaces.

Innovate freely with a huge library of free AI generators.
Innovate freely with a huge library of free AI generators.
A curated AI tools directory with 5,000+ listings
A curated AI tools directory with 5,000+ listings
Find, compare, and learn to use the best AI tools
Find, compare, and learn to use the best AI tools
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceFree practical deep learning courses, research and open-source libraries

Free / Open-sourceOpen-source database of AI models, prices and capabilities
Free / Open-sourceOpen-source database of AI models, prices and capabilities

Marketplace to find, hire, or build AI agents for real work
Marketplace to find, hire, or build AI agents for real work
Free / Open-sourceFree open course for prompt engineering and AI security
Free / Open-sourceFree open course for prompt engineering and AI security

A hand-curated directory for discovering AI tools and resources
A hand-curated directory for discovering AI tools and resources

Courses and best practices for building AI-powered products end to end
Courses and best practices for building AI-powered products end to end
The bug bounty platform built for AI and ML security
The bug bounty platform built for AI and ML security

A curated directory of 30,000+ custom GPTs and AI agents
A curated directory of 30,000+ custom GPTs and AI agents