Mobile & Other

Mobile App Distribution and Feedback

• Appho.st - Mobile app hosting platform. The free plan includes five apps, 50 monthly downloads, and a maximum file size of 100 MB.
• Diawi - Deploy iOS & Android apps directly to devices. Free plan: app uploads, password-protected links, 1-day expiration, ten installations.
• GetUpdraft - Distribute mobile apps for testing. The free plan includes one app project, three app versions, 500 MB storage, and 100 app installations per month.
• InstallOnAir - Distribute iOS & Android apps over the air. Free plan: unlimited uploads, private links, 2-day expiration for guests, 60 days for registered users.
• Loadly - iOS & Android beta apps distribution service offers completely free services with unlimited downloads, high-speed downloads, and unlimited uploads.

Education and Career Development

• Cisco Networking Academy, Skills for All - Offers free certification-aligned courses in topics like cybersecurity, networking, and Python.
• CloudCertPrep - Free, open-source AWS certification practice exams with 1,050+ questions for CLF-C02. Features timed mock exams, domain practice, spaced repetition, and progress tracking.
• DeepLearning.AI Short Courses - Free short courses from industry-leading experts to get hands-on experience with the latest generative AI tools and techniques in an hour or less.
• DevNet Academy - Free, self-paced training for the Cisco DevNet Expert / CCIE Automation certification. Covers Python Click and Flask-RESTx.
• Django-tutorial.dev - Free online guides for learning Django as their first framework & gives free dofollow backlink to articles written by users.
• edX - Offers access to over 4,000 free online courses from 250 leading institutions, including Harvard and MIT, specializing in computer science, engineering, and data science.
• Exercism - Free, open-source programming education in over 75 programming languages, with human mentoring. A nonprofit organisation.
• Free Professional Resume Templates & Editor - Free platform with lots of Resume templates of Experienced Professionals, ready to clone and edit fully and download, ATS optimized.
• FreeCodeCamp - Open-source platform offering free courses and certifications in Data Analysis, Information Security, Web Development, and more.
• Full Stack Open - Free university-level course on modern web development with React, Node.js, GraphQL, TypeScript, and more. Fully online and self-paced.
• Interactive CV - AI-powered resume builder with real-time editing and ATS optimization. Free tier includes automatic CV conversion to premium templates (Harvard, Europass), PDF export, job tracker with unlimited job posting insights and CV sharing with chat/voice features.
• Khan Academy - Free online guides for learning basic and advanced HTML/CSS, JavaScript and SQL.
• LabEx - Develop skills in Linux, DevOps, Cybersecurity, Programming, Data Science, and more through interactive labs and real-world projects.
• MIT OpenCourseWare - MIT OpenCourseWare is an online publication of materials from over 2,500 MIT courses, freely sharing knowledge with learners and educators around the world. Youtube channel can be found at [@mitocw](https://www.youtube.com/@mitocw/featured)
• Reactive Resume - Free, open-source resume builder with dozens of templates. Exports to PDF, DOCX and also provides a publicly shareable link to the resume (opt-in).
• Roadmap.sh - Free learning roadmaps covering all aspects of development from Blockchain to UX Design.
• The Odin Project - Free, open-source platform with a curriculum focused on JavaScript and Ruby for web development.
• W3Schools - Offers free tutorials on web development technologies like HTML, CSS, JavaScript, and more.

International Mobile Number Verification API and SDK

• numverify - Global phone number validation and lookup JSON API. 100 API requests/month
• veriphone - Global phone number verification in a free, fast, reliable JSON API. 1000 requests/month

Payment and Billing Integration

• Adapty.io - One-stop solution with open-source SDK for mobile in-app subscription integration to iOS, Android, React Native, Flutter, Unity, or web app. Free up to $10k monthly revenue.
• CoinMarketCap - Provides cryptocurrency market data including the latest crypto and fiat currency exchange rates. The free tier offers 10K call credits/month.
• Currencyapi - Free currency conversion and exchange rate data API. Free 300 requests per month, 10 requests per minute for private use.
• CurrencyApi - Live Currency Rates for Physical and Cryptocurrencies, delivered in JSON and XML. The free tier offers 1,250 API requests/month.
• CurrencyFreaks - Provides current and historical currency exchange rates. Free DEVELOPER plan available with 1000 requests/month.
• currencylayer - Reliable Exchange Rates and Currency Conversion for your Business, 100 API requests/month free.
• exchangerate-api.com - An easy-to-use currency conversion JSON API. The free tier updates once per day with a limit of 1,500 requests/month.
• FraudLabs Pro - Screen an order transaction for credit card payment fraud. This REST API will detect all possible fraud traits based on the input parameters of an order. The Free Micro plan has 500 transactions per month.
• FxRatesAPI - Provides real-time and historical exchange rates. The free tier requires attribution.
• Moesif - API analytics for REST and GraphQL. (Free up to 500,000 API calls/mo)
• ParityVend - Automatically adjust pricing based on visitor location to expand your business globally and reach new markets (purchasing power parity). The free plan includes 7,500 API requests/month.
• Qonversion - All-in-one cross-platform subscription management platform offering analytics, A/B testing, Apple Search Ads, remote configs, and growth tools for optimizing in-app purchases and monetization. Compatible with iOS, Android, React Native, Flutter, Unity, Cordova, Stripe, and web. Free up to $10k in monthly tracked revenue.
• RevenueCat - Hosted backend for in-app purchases and subscriptions (iOS and Android). Free up to $2.5k/mo in tracked revenue.
• vatlayer - Instant VAT number validation and EU VAT rates API, free 100 API requests/month

Flutter Related and Building IOS Apps without Mac

• codemagic.io - Free 500 build minutes/month
• FlutLab - FlutLab is a modern Flutter online IDE and the best place to create, debug, and build cross-platform projects. Build iOS (Without a Mac) and Android apps with Flutter.
• Flutter Flow - Build your Flutter App UI without writing a single line of code. Also has a Firebase integration. The free plan includes full access to UI Builder and Free templates.

Miscellaneous

• BinShare.net - Create & share code or binaries. Available to share as a beautiful image e.g. for Twitter / Facebook post or as a link e.g. for chats or forums.
• Blynk - A SaaS with API to control, build & evaluate IoT devices. Free Developer Plan with 5 devices, Free Cloud & data storage. Mobile Apps are also available.
• cron-job.org - Online cronjobs service. Unlimited jobs are free of charge.
• Cronhooks - Schedule on-time or recurring webhooks. The free plan allows 5 ad-hoc schedules.
• datelist.io - Online booking / appointment scheduling system. Free up to 5 bookings per month, includes 1 calendar
• FOSSA - Scalable, end-to-end management for third-party code, license compliance and vulnerabilities.
• Hook Relay - Add webhook support to your app without the hassles: done-for-you queueing, retries with backoff, and logging. The free plan has 100 deliveries per day, 14-day retention, and 3 hook endpoints.
• Hosting Checker - Check hosting information such as ASN, ISP, location and more for any domain, website or IP address. Also includes multiple hosting and DNS-related tools.
• newreleases.io - Receive notifications on email, Slack, Telegram, Discord, and custom webhooks for new releases from GitHub, GitLab, Bitbucket, Python PyPI, Java Maven, Node.js NPM, Node.js Yarn, Ruby Gems, PHP Packagist, .NET NuGet, Rust Cargo and Docker Hub.
• PDFMonkey - Manage PDF templates in a dashboard, call the API with dynamic data, and download your PDF. Offers 300 free documents per month.
• Pika Code Screenshots - Create beautiful, customizable screenshots from code snippets and VSCode using the extension.
• QuickType.io - Quickly auto-generate models/class/type/interface and serializers from JSON, schema, and GraphQL for working with data quickly & safely in any programming language. Convert JSON into gorgeous, typesafe code in any language.
• readme.com - Beautiful documentation made easy, free for Open Source.
• redirect.pizza - Easily manage redirects with HTTPS support. The free plan includes 10 sources and 100,000 hits per month.
• redirection.io - SaaS tool for managing HTTP redirections for businesses, marketing and SEO.
• redirs.com - Easy domain redirects with auto-SSL, analytics, and URL path forwarding. Free for basic use (up to 5 domains).
• ReqBin - Post HTTP Requests Online. Popular Request Methods include GET, POST, PUT, DELETE, and HEAD. Supports Headers and Token Authentication. Includes a basic login system for saving your requests.
• Smartcar API - An API for cars to locate, get fuel tank, battery levels, odometer, unlock/lock doors, etc.
• Sunrise and Sunset - Get sunrise and sunset times for a given longitude and latitude.
• superfeedr.com - Real-time PubSubHubbub compliant feeds, export, analytics. Free with less customization
• SurveyMonkey.com - Create online surveys. Analyze the results online. The free plan allows only 10 questions and 100 responses per survey.
• SYNCDATE - Two-way Google Calendar sync. Free tier: 2 accounts, unlimited events.
• UUID Generator - Generate UUID v1, UUID v4, UUID v7, GUID, Nil UUIDs, CUID v1/v2, NanoID, and ULID instantly with enterprise-grade
• Versionfeeds - Custom RSS feeds for releases of your favorite software. Have the latest versions of your programming languages, libraries, or loved tools in one feed. (The first 3 feeds are free)

Remote Desktop Tools

• AnyDesk - Free for 3 devices, no limits on the number and duration of sessions
• Getscreen.me - Free for 2 devices, no limits on the number and duration of sessions
• RemSupp - On-demand support and permanent access to devices (2 sessions/day for free)
• RustDesk - Open source virtual/remote desktop infrastructure for everyone!

Other Free Resources

• get.localhost.direct - A better `*.localhost.direct` Wildcard public CA signed SSL cert for localhost development with sub-domain support
• GitHub Education - Collection of free services for students. Registration required.
• Glob tester - A website that allows you to design and test glob patterns. It also provides resources to learn glob patterns.
• Killer Coda - Interactive playground in your browser to study Linux, Kubernetes, Containers, Programming, DevOps, Networking
• Microsoft 365 Developer Program - Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform. The subscription is a 90-day [Microsoft 365 E5 Subscription](https://www.microsoft.com/microsoft-365/enterprise/e5) (Windows excluded) which is renewable. It is renewed if you're active in development(measured using telemetry data & algorithms).
• MySQL Visual Explain - Easy-to-understand and free MySQL EXPLAIN output visualizer to optimize slow queries.
• RedHat for Developers - Free access to Red Hat products including RHEL, OpenShift, CodeReady, etc. exclusively for developers. Individual plan only. Free e-books are also offered for reference.
• sandbox.httpsms.com - Send and receive test SMS messages for free.
• SimpleBackups.com - Backup automation service for servers and databases (MySQL, PostgreSQL, MongoDB) stored directly into cloud storage providers (AWS, DigitalOcean, and Backblaze). Provides a free plan for 1 backup.
• SimpleRestore - Hassle-free MySQL backup restoration. Restore MySQL backups to any remote database without code or a server.
• SnapShooter - Backup solution for DigitalOcean, AWS, LightSail, Hetzner, and Exoscale, with support for direct database, file system and application backups to s3 based storage. Provides a free plan with daily backups for one resource.