AdBlock 

Purpose: Block Ads on all web pages, even Facebook, YouTube, and Hulu. 

Platform: Chrome, Firefox, Edge, Safari, iOS and Android. 

Easy YouTube Video Downloader

Purpose: Download YouTube videos for free in the highest available quality and save them directly to your device.

Platform: exclusively for Firefox.

Dark Reader

Purpose: Enable dark mode on any website for free to reduce eye strain.

Platform: Chrome, Firefox, Edge, Safari, iOS and Android. 

Unpaywall

Purpose: To find free, legally accessible research papers and scientific journal articles that might require paid subscriptions.

Platform: Chrome and Firefox.

Rakuten

Purpose: Earn cashback on eligible online purchases and discover available coupon codes at participating stores.

Platform: Website, Chrome extension and supported mobile apps.

OpenRouter

Purpose: Access multiple AI models from different providers through one unified API. Compare models, experiment with available free options, and integrate AI into your applications.

Platform: Website and API.

GroqCloud

Purpose: Run AI models with fast inference speeds through a cloud-based API. Build AI-powered applications, experiment with supported language models, and integrate AI capabilities into your projects.

Platform: Web Platform and API.

Gemini Notebook

Purpose: Research, summarize documents, and understand information with an AI-powered research assistant. Upload PDFs, websites, YouTube videos, and notes to get answers with citations, generate summaries, and create study materials.

Platform: Web Platform and Mobile App.

GIMP

Purpose: Edit and retouch photos, remove backgrounds, enhance image quality, create logos, design graphics, work with layers, apply filters, and create professional digital artwork for websites, social media, and marketing projects.

Platform: Windows, macOS, and Linux.

DaVinci Resolve

Purpose: Edit videos, add visual effects, create animations, enhance audio, apply cinematic color grading, and produce professional-quality videos for YouTube, social media, and filmmaking projects.

Platform: Windows, macOS, and Linux.

idsnoop

Purpose: Search usernames across 500+ websites to discover public social media profiles and online accounts. View publicly available profile details such as display names, bios, profile photos, locations, and follower counts.

Platform: Web-based (accessible through a browser).