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Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical...
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usZIPCodes.org
REST API for US ZIP, ZIP+4, and Canadian postal codes. Single unified endpoint covers address validation and standardization, radius search (centroid haversine and true spatial polygon intersection), point-to-point distance, autocomplete/typeah

Which is more popular?
Based on our record, Pure Data seems to be more popular. It has been mentioned 41 times since March 2021.
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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| Website | puredata.info | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Pure Data yet.
API for US ZIP, ZIP+4, and Canadian postal code data. One unified endpoint set covers North America — no separate APIs by country or data type. What it does Address validation and standardization — production-grade parser with ZIP+4 append, refreshed monthly Radius search — centroid haversine and...
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Introduction to Pure Data
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Recommendations tracked on public social media and blogs since March 2021.

The whole thing is three runtimes glued together. DragonRuby GTK (mRuby) handles the game side: scenes, UI, sprite rendering, the per-tick game loop, the XP and tier-progression system. Pure Data, embedded via libpd, handles every audio... - Source: dev.to / 6 months ago
I'm just going to mention Pure Data here, because I'm always surprised when people don't know about it. https://puredata.info/ I use it in my art and music practice to interfaced with hardware like a GameTrak controller, and to control... - Source: Hacker News / 6 months ago
I'm getting back in to audio programming, starting off with Pd[1] and reading Miller Puckette's book[2]. I'm planning on writing some low-level C libraries afterwards, using The Audio Programming[3] book as a guide [1]... - Source: Hacker News / 12 months ago
Tracking ZIP Code API since May 2026.
When comparing Pure Data and ZIP Code API, you can also consider the following products.

A real time audio synthesis engine, and an object-oriented programming language specialised for...
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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