Let’s share hidden gem tools, not the usual stuff that shows up in every "top developer tools" post, but smaller tools and projects that made you think, "wait, this is actually really useful."

I'll start with 3 I've come across:

1. Archify
https://github.com/tt-a1i/archify

Found this recently. It's an agent skill that works with Claude Code, Cursor and Codex and basically turns a codebase into an interactive architecture map.

You can export it as HTML/PNG/SVG/WebM, and one thing I thought was pretty cool is that you can diff the architecture before a merge to see how a PR changes the system.

2. boneyard-js
https://boneyard.vercel.app

Generates skeleton screens from your actual UI instead of making you manually recreate the layout with placeholder components.

Pretty nice alternative to manually maintaining react-loading-skeleton stuff.

3. Gradient Studio
https://gradientsaas.blogspot.com

Simple procedural CSS gradient generator.

Has stuff like mesh gradients, aurora effects and grain. You mess with the settings and copy the result as CSS, Tailwind or SCSS.

I've been using it mostly for quick landing page backgrounds.

What's one tool you keep recommending that somehow still isn't very well known?

Due to a growing influx of questions on this topic, it has been decided to commit a monthly thread dedicated to this topic to reduce the number of repeat posts on this topic. These types of posts will no longer be allowed in the main thread.

Many of these questions are also addressed in the sub FAQ or may have been asked in previous monthly career threads.

Subs dedicated to these types of questions include r/cscareerquestions for general and opened ended career questions and r/learnprogramming for early learning questions.

A general recommendation of topics to learn to become industry ready include:

• HTML/CSS/JS Bootcamp
• Version control
• Automation
• Front End Frameworks (React/Vue/Etc)
• APIs and CRUD
• Testing (Unit and Integration)
• Common Design Patterns

You will also need a portfolio of work with 4-5 personal projects you built, and a resume/CV to apply for work.

Plan for 6-12 months of self study and project production for your portfolio before applying for work.

My main domain is 25+ years old and has a great reputation, never used for spam or anything like that. I've been having the emails forwarded through WHM / cPanel to my Gmail.

7 days ago I moved my main site to a new VPS, and copied over the forwarders. But today I discovered that I'm missing the wide majority of my emails! I found them in WHM > View Relayers, about 241 out of 250 were rejected by my Gmail with this error:

TLS_AES_256_GCM_SHA384:256 CV=yes : SMTP error from remote mail server after end of data: 550-5.7.1 [<new VPS IP> 19] Gmail has detected that this message is likely\n 550-5.7.1 suspicious due to the very low reputation of the sending domain. To\n 550-5.7.1 best protect our users from spam, the message has been blocked. For\n 550-5.7.1 more information, go to\n 550 5.7.1 https://support.google.com/mail/answer/188131 af79cd13be357-93917765ba8si962882385a.175 - gsmtp 

I double checked in Postmaster Tools, and the domain's reputation is stellar. So when it says "low reputation of the sending domain", I have to assume it means the IP of the new VPS. MXToolbox confirms that the IP isn't on any blacklists, although the parent ASN is on the UCEPROTECT-Level3 list (which covers thousands of domains so it's not MY domain, but I can pay an extortion fee to get mine whitelisted).

Any suggestions?