请问HN：哪些通过用户界面需要花钱的任务在代码中是免费的？
作为一个最近才开始接触编程的人，我对市面上各种免费的工具感到惊讶。
比如说，ffmpeg（我已经使用了很长时间）就是一个典型的例子，它体现了“如果你能搞定，那是免费的；如果你搞不定，我可以卖给你一把铲子”的理念，几乎所有的视频下载工具都在使用它。我曾经认为下载4K文件有一个硬性限制，直到我意识到有yt-dlp和ffmpeg的存在。
另一个例子是：今天我了解到Bluesky Jetstream协议是完全免费的，这让我感到惊讶，因为你可以从中获取大量的数据和推断（类似的API，尽管来自更大规模的社交数据集，如谷歌地图和X，都是收费的）。
似乎在过去二十年中，许多有用工具的入门门槛仅仅是最低限度的编码能力。既然这个门槛已经降低，你能否分享一些适合我们这些愿意尝试代码、数据或出于好奇心的人使用的最佳工具？
当然，我并不反对为开发者支付费用，以便为我们这些新手提供便利。但我希望更好地理解免费层的世界，因为这确实改变了我对这个领域经济学的一些看法。
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As someone who only recently started getting their feet wet thanks to vibe coding, I am kind of amazed at all the free tools out there.<p>Like how ffmpeg (which I've used for a long time) was the original case of "if you can figure it out, it's free; if you can't, I can sell you a shovel" with virtually every video downloader tool out there using it. I used to think there was a hardcoded limit to downloading files in 4K until I realised yt-dlp and ffmpeg existed.<p>Another example: TIL the Bluesky Jetstream protocol is completely free, which is amazing to me because of all the data and inference you can get from it (similar APIs, albeit from much larger social datasets like Google Maps and X, are not free.<p>It seems that the entry barrier to a lot of useful tools over the last two decades has been a minimal ability to code. Since that barrier has now dropped, would you share the best things out there for those of us willing to experiment with code, data or just out of curiosity?<p>OFC I'm not against paying a developer for adding convenience for us noobs. But I would like to better understand the free-tier world because it does change some of my notions about economics in this space.