
Omni Calculator
calculator.net
Build vs. Buy Calculator
DeveloperToolStack
DevNestTools
DevTools Advanced
DevTools.fit
Free, no-signup calculators for the money side of building software and freelancing
Violentmonkey
Database Script Tool
Userscripts
Script Manager – SManager
Greasemonkey
Tampermonkey
UserStyles.world
A site for user scripts.

Which is more popular?
Based on our record, Greasy Fork seems to be more popular. It has been mentioned 29 times since March 2021.
Website, pricing, platforms and company facts side by side.
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GF
Greasy Fork
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|---|---|---|
| Website | devfinancetools.com | greasyfork.org |
| Pricing | — | |
| Company | 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.

DevFinanceTools is a collection of free, no-signup calculators for the money side of building software and freelancing. Everything runs in your browser — no account, no tracking beyond basic page-view analytics — and every tool shows its formulas and benchmarks so you can check the maths...
No description of Greasy Fork yet.
What each product offers, as listed by its team.

Possible disadvantages
Walkthroughs and reviews on video.
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moonlight feels right
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using DevFinanceTools and Greasy Fork. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking DevFinanceTools since Aug 2026.
Have tampermonkey installed (google), then go to greasyfork (website) I have the link here https://greasyfork.org/en and search up character ai, have fun :)). Source: over 3 years ago
If the above mentioned URL rewriter doesn't work for you (I found it hard to use myself, and never could get the rules figured out), then you could try using https://github.com/janekptacijarabaci/greasemonkey and finding a redirect... Source: over 3 years ago
I was thinking more greasemonkey / userscripts. Source: over 3 years ago
When comparing DevFinanceTools and Greasy Fork, you can also consider the following products.

Helping you make rational decisions, one calculation at a time.
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Violentmonkey is a userscript manager to support running userscripts in web pages.
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Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.
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Database Script Tool is an all-in-one functional code generator that allows you to generate several types of code, including SQL standard commands, classes, resource files, HTML 5 forms, Data managers, and more to add.
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Should you build an internal tool? Or just buy it?
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An open-source userscript editor for Safari.
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