
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

AbeBooks
DealOz.com
Occupy the Bookstore
Bookfinder
SlugBooks
BookMooch
CheapestTextBooks
Bigwords.com is a powerful search engine that enables you to buy, rent, or sell textbooks online.

Which is more popular?
Based on our record, Bigwords.com seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | devfinancetools.com | bigwords.com |
| 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 Bigwords.com yet.
What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using DevFinanceTools and Bigwords.com. 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.
eBay, you can also try bigwords.com which checks multiple buyback sites for the highest selling price. Source: over 3 years ago
When I was in school, I used bigwords.com to buy any physical copy of a textbook I needed. It's a comparison shopper, and checks the difference between buying and renting at several stores. Source: over 3 years ago
Echoing that you'll probably get very little or no money from them, but my recommendation is to try bigwords.com. You can load all of your books into your cart, click 'sell' instead of buy, and they'll aggregate the best websites to buy... Source: about 4 years ago
When comparing DevFinanceTools and Bigwords.com, you can also consider the following products.

Helping you make rational decisions, one calculation at a time.
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AbeBooks has millions of new & used books, rare books and out of print books.
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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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Save time. Save money. Discover. Search new and used books, textbooks, and ebooks using the most trusted shopping comparison site, DealOz.com.
Compare DealOz.com to DevFinanceTools or Bigwords.com:

Should you build an internal tool? Or just buy it?
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Chrome extension to easily surface cheaper textbooks
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