PDF VertexAI Productivity
Merge, split and compress PDFs in your browser. Free, no sign-up.
Free tools built by indie founders
Every product here was submitted to Stackboo by the person who built it, and each one has a free plan, a free tier or an open-source version.
They are small, mostly new, and made by one person or a small team. That means you can talk to the maker, and a vote or a comment from you counts. Check each product's own site for what the free version covers.
All 11 products at a glance
| Product | Job | Pricing | Good for |
|---|---|---|---|
| PDF Vertex | Everyday utilities | Free | - |
| PXResizer | Everyday utilities | FreeFree forever, no hidden costs, no watermarks | Resize images by pixels or percentage, Compress images to reduce file size |
| InstantCalcs | Everyday utilities | Free100% free, no signup required | Calculate BMI for men and women, Estimate ovulation date and fertile window |
| Tale | Run a project or a community | Open sourceFree MIT Community self-hosting; infrastructure and model usage are separate. Optional… | Shared tasks, files and project discussion, Explicit delegation to configured agent runtimes |
| Hackyard | Run a project or a community | FreeFree to join every Yard. Sponsored Yards add cash prizes. | Week-long solo hackathons, twice a month, Build with any AI model or tool |
| FormSubmit | Small tools a website needs | FreemiumFree $0/mo; Starter $5/mo ($4.17 yearly); Pro $15/mo ($12.50 yearly); Business $50/mo… | Receive HTML form submissions by email, Block spam with honeypots, heuristics and rate limiting |
| consentaur | Small tools a website needs | FreemiumFree: €0/mo; Starter: €6/mo (€60/yr); Growth: €19/mo (€190/yr); Business: €45/mo… | Show a cookie consent banner that blocks tracking until consent, Automatically scan and categorise website cookies |
| rdyrct | Small tools a website needs | FreemiumFree: 1 organization, 30 links, 3 teammates, 7-day analytics, API and MCP access. Paid… | Branded short links on custom domains with chosen slugs, QR codes and a public QR generator with PNG/SVG downloads |
| ResourcesHunt | Find more tools and get listed | Free | Discover AI tools for research, writing, automation, and everyday productivity., Find helpful programming tools, developer resources, and tutorials to build your |
| Founder Battle | Find more tools and get listed | Free | Challenge other founders' products head-to-head, Climb a public leaderboard for visibility |
| Zero Revenue Club | Find more tools and get listed | FreemiumFree (badge required); Badge-free $9→$4.99 one-time; Growth Tools free, Featured add-on… | List a launched product in a public directory, Track days since launch and days to first revenue |
Pricing and use cases come from each product's own Stackboo listing. Prices change, so check the product's site before you buy.
1. Everyday utilities
Small tools that do one job in the browser. Check whether your files stay on your device or go to a server, and whether you need an account.
PXResizerAI Image Generation
Free browser-based tool to resize, compress, crop and convert images for founders.
Pricing: Free forever, no hidden costs, no watermarks
2. Run a project or a community
Planning work and meeting other builders. Look at whether the product is open source, and what its free version limits.
TaleAI Agents & Automation
Tale is collaborative project management for teams and AI agents.
Pricing: Free MIT Community self-hosting; infrastructure and model usage are separate. Optional Enterprise operation and support.
3. Small tools a website needs
Forms, cookie consent and short links. Check what the free plan counts (submissions, visitors or clicks) and where the data is stored.
FormSubmitDeveloper Products
A hosted form backend that emails, filters spam and forwards submissions for any website, no server needed.
Pricing: Free $0/mo; Starter $5/mo ($4.17 yearly); Pro $15/mo ($12.50 yearly); Business $50/mo ($41.67 yearly)
consentaurLegal
Cookie consent banner for small businesses with automatic scanning and consent records
Pricing: Free: €0/mo; Starter: €6/mo (€60/yr); Growth: €19/mo (€190/yr); Business: €45/mo (€450/yr). Excl. VAT.
rdyrctAI Marketing & SEO
Shorten links and see who clicks them, with campaign analytics that never store IP addresses.
Pricing: Free: 1 organization, 30 links, 3 teammates, 7-day analytics, API and MCP access. Paid plans from $4/month.
4. Find more tools and get listed
Directories where founders share what they built. Look at how new the listings are, and whether listing your own product is free.
ResourcesHuntDeveloper Products
Finding useful tools and resources online can take time.
Founder BattleLaunch Platforms
A leaderboard-based arena where founders challenge each other's products to get discovered.
Zero Revenue ClubLaunch Platforms
A directory where founders list new products and track progress toward first revenue
Pricing: Free (badge required); Badge-free $9→$4.99 one-time; Growth Tools free, Featured add-on separate
Quick answers
Which products in this guide can I use for free?
All 11 can be used free: they have a free plan, a free tier or an open-source version (PDF Vertex, PXResizer, InstantCalcs, Tale, Hackyard, FormSubmit and 5 more). Free plans have limits, so read the pricing line under each product.
Which of these are open source?
Tale is listed as open source. Check each product's site for the licence and for how to run it yourself.
How are the products in this guide chosen and ordered?
They are grouped by the job they do, and a product appears only while its Stackboo listing is live. It is not a ranking: rankings on Stackboo come from community votes, and a paid Featured spot never changes them.
How this guide is made
A guide groups products by the job they do. It is not a ranking: rankings on Stackboo come from votes, and a paid Featured spot never changes them. A product is listed here only while its Stackboo listing is live, and its tagline and pricing line are the ones on that listing.
Want a product added? Submit it for free.
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