Best new developer, learning and open-source resources: 24 October

The directory additions from 24 October were thirty free tools and websites and ten open-source projects from GitHub. This roundup groups them into focus, planning and meetings, design resources, developer utilities, email and website checks, learning to code, research and reading, and open-source apps. Features and pricing change, so check each tool's own page before you rely on it.

Focus, planning and meetings

LifeAt turns your browser into a calm workspace with looping scenes, an ambient soundboard, a Pomodoro timer, a to-do list and notes. The free plan includes the timer, tasks and a limited set of spaces, while the daily planner needs Pro. Tweek lays out your week as simple columns, much like a paper planner; reminders, repeating tasks and calendar sync are part of Premium.

Are.na lets you save links, images, text and files as blocks and organise them into shared channels. It is ad-free, and the free plan holds up to 200 blocks. Slido adds live polls, quizzes and an upvoted Q&A to meetings and works with PowerPoint, Google Slides, Zoom and Webex; the free Basic plan is capped at 100 participants and three polls per slido. Slides.com builds web-based decks in the browser, though free decks are public and show ads.

Smash sends large files by email or link with no account needed. Free transfers over 2 GB wait in a queue and links expire after seven days. Wheel of Names picks a random name or option from a list you paste in, and Omni Calculator offers thousands of free calculators with plain explanations of each formula. Both show ads, and Omni's results are estimates rather than professional advice, while Wheel of Names is not meant for official prize draws.

Design resources

Open Doodles is a set of free sketchy illustrations by Pablo Stanley, free for personal and commercial use with no credit needed. Resource Boy curates free fonts, mockups, textures and other assets; its own items are royalty-free, but third-party items carry their own licences, so read them before use. Design Resources is a hand-picked directory of more than 300 design tools, with some affiliate links, and Sidebar shares five design links every weekday, including sponsored slots.

Developer utilities

Compiler Explorer compiles code in dozens of languages and shows the generated assembly side by side. Devhints and QuickRef.ME are free cheatsheet collections for languages, tools and editors, handy for quick lookups but no substitute for full documentation. JSFiddle is a playground for HTML, CSS and JavaScript snippets, free with ads, and transform.tools converts formats such as JSON to TypeScript or CSS to Tailwind, though the output may need tidying.

DrawSQL draws database diagrams for MySQL, PostgreSQL, SQL Server and MariaDB; free diagrams are public only and exports need a paid plan. Bundlephobia shows how much an npm package adds to your JavaScript bundle and suggests lighter alternatives, though sizes in your own build can differ. DEV Community is a free platform where developers publish articles and tutorials, with quality that varies from post to post.

Email and website checks

Can I Email shows which HTML and CSS features work across email clients such as Gmail, Outlook and Apple Mail, but clients change without notice, so real test sends still matter. mail-tester.com scores an email out of ten and explains problems with SPF, DKIM, DMARC and content, with three free tests every 24 hours. SSL Labs Server Test by Qualys grades a public website's HTTPS setup from A to F; the results are technical, so beginners may need some reading alongside them.

Learning to code

Eloquent JavaScript is a free online book with interactive examples and exercises in every chapter. Frontend Mentor offers realistic front-end challenges, many of them free, while design files and premium projects need Pro. CSSBattle, Flexbox Froggy and SQLBolt teach through practice: recreating target images in as little CSS as possible, guiding frogs across 24 flexbox levels, and writing real SQL queries in the browser. Flexbox Froggy and SQLBolt cover the basics only.

Research and reading

Wikipedia is the free, ad-free encyclopedia run by the non-profit Wikimedia Foundation; article quality varies, so it should not be your only source for serious work. The Public Domain Review is a non-profit online journal of curious public domain art, books and film, and rights can vary by country and item.

Open-source apps

Several of the ten GitHub projects deal with files. BentoPDF and OmniTools process PDFs, images and more in your browser rather than uploading them, while ConvertX converts between more than a thousand formats on your own server and needs Docker. linkding is a minimal bookmark manager you host yourself, with tags, Markdown notes and browser extensions.

For notes and tasks, QOwnNotes stores notes as plain Markdown files on Windows, macOS and Linux, and Kanri is an offline Kanban app that keeps everything in one local file, with no sync or team sharing and no 1.0 release yet. Beaver Habit Tracker focuses on consistency over goals and can be self-hosted or used through a hosted version with paid plans.

Three projects involve AI. Chatbox Community Edition is a client for ChatGPT, Claude, Gemini, DeepSeek or local models through Ollama, using your own keys, so you pay providers for your usage. anarlog is a private meeting notetaker that records on your own device, with some local features Mac-only. Hyperresearch is a deep research skill for Claude Code and OpenAI Codex that checks citations before writing a report, and it needs one of those tools plus API usage.

You can find all of these, along with every other tool and guide, in the full Best Productivity Resources directory, where you can filter by category, pricing and platform.