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Developer Tools

Kaizen Agent logo

1. Kaizen Agent

Kaizen Agent is your AI agent’s built-in QA and improvement engine.It automatically generates test cases, executes them, identifies failures, and suggests or applies fixes to both code and prompts — all without human intervention.Whether you’re building retrieval agents, multi-turn assistants, or tool-using agents, Kaizen Agent continuously evaluates and enhances their behavior, architecture, and guardrails to improve reliability and generalization over time.No more manual testing. No more brittle prompts. Just better agents — on autopilot.

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NEXTDEVKIT logo

2. NEXTDEVKIT

IntroductionNEXTDEVKIT is a full-stack OpenNext & Next.js SaaS starter kit designed to accelerate the development and deployment of production-ready SaaS applications. Key features include:Authentication: Built-in authentication system for user management.Payment Integration: Pre-configured payment processing capabilities.Database Support: Integrated database for data storage and management.Multi-Platform Deployment: Native support for Vercel, Cloudflare Workers, and AWS.Ideal for:SaaS founders and entrepreneursWeb developers seeking rapid prototypingTeams looking to streamline SaaS developmentNEXTDEVKIT offers a significant time-saving advantage by providing a comprehensive template that handles essential SaaS functionalities, allowing developers to focus on core product features and innovation.

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API Radar logo

3. API Radar

API Radar is a real-time monitoring tool that scans public GitHub commits for accidentally exposed API keys—like OpenAI, Google, Anthropic, and others. Developers often leak credentials without realizing it, and API Radar helps catch those moments as they happen.The platform continuously analyzes newly pushed code, looking for patterns and signatures of API keys. When a leak is detected, the tool logs it in a live dashboard with metadata like repo name, author, commit timestamp, and type of key. This allows users to audit potential breaches, monitor trends, and react quickly before damage occurs.API Radar was built solo as a passion project, with the goal of making infosec more accessible to everyone—from indie hackers to enterprise engineers. It’s part of a growing wave of developer-first tools that put transparency and awareness first.

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Dirstarter logo

4. Dirstarter

Build and launch profitable directory websites faster than ever with this comprehensive Next.js boilerplate. Skip months of development and start generating revenue immediately with built-in monetization features.Key features include:Multiple revenue streams - Earn through listings, featured spots, affiliate links, and adsStripe integration - Accept payments globally with seamless checkoutAI-powered content - Generate professional descriptions and category recommendationsSEO optimized - Built with best practices to rank higher in search resultsModern tech stack - Next.js 15, TypeScript, TailwindCSS, and Shadcn UIAdmin panel - Manage listings, users, and payments from one dashboardAuthentication system - Secure user registration and login functionalityBlog functionality - Drive organic traffic with built-in blogging featuresThe boilerplate comes with lifetime updates and email support. Choose from Basic ($149), Pro ($199) with priority support and Discord access, or Custom ($999+) with full setup service. Pay once, build unlimited directories - the code is yours forever.Perfect for entrepreneurs, developers, and businesses looking to create local directories, business listings, job boards, or niche marketplaces without starting from scratch.

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LLMs.txt File Generator logo

5. LLMs.txt File Generator

IntroductionLLMs.txt File Generator is a tool that converts website content into structured text files optimized for large language models. Key features include:Website Content Conversion: Quickly transforms website URLs into llms.txt files.Customizable Generation: Allows users to set generation depth and the number of pages to process.robots.txt and sitemap.xml Respect: Adheres to robots.txt protocol and utilizes sitemap.xml for efficient crawling.Ideal for:AI/ML Engineers: Streamlining data preparation for LLM training.Data Scientists: Enhancing data quality for model inference.Web Developers: Providing structured website data for AI applications.This tool solves the context window limitations of LLMs by providing condensed, core website information in a standardized format, enabling models to better understand and utilize website data.

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W.is Whois Lookup logo

6. W.is Whois Lookup

IntroductionW.is Whois Lookup is a next-generation WHOIS lookup tool with a modern UI. It supports Domain, IPv4, IPv6, ASN, and CIDR WHOIS lookups. Key features include:Comprehensive Lookup: Supports various lookup types including Domain, IPv4, IPv6, ASN, and CIDR.Modern UI: Offers a user-friendly and intuitive interface for easy navigation.Efficient and Simple: Designed for quick and efficient WHOIS information retrieval.Ideal for:Network administratorsSecurity professionalsDomain investorsW.is Whois Lookup provides a simple and efficient way to access WHOIS information with a modern and intuitive user interface.

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IP.IM logo

7. IP.IM

IntroductionIP.IM is a free and fast IP address lookup and geolocation tool. Key features include:IP Geolocation: Quickly identify the country, city, region, and coordinates associated with any IP address.ISP & Organization Detection: Determine the Internet Service Provider (ISP) and organization owning the IP address.VPN Detection: Identify if an IP address is associated with a VPN.API Access: Integrate IP.IM's functionality into your own applications with simple API calls.Ideal for:Developers needing IP geolocation data for their applications.Security professionals investigating suspicious IP addresses.Website owners wanting to understand their audience's location.Anyone curious about the location of an IP address.IP.IM offers a fast, free, and accurate way to get detailed information about any IP address, making it a valuable tool for a wide range of users.

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PromptDC - Cursor for Prompts logo

8. PromptDC - Cursor for Prompts

Vibe coding prompting | One-click prompt enhancement for every AI web platform & local editorsEver find yourself typing “fix this” for the tenth time, or getting stuck in a loop of typos and unclear prompts while vibe coding? Same here. As builders, we’ve all had those moments where the AI doesn’t “get” us, and we end up blaming the model, reverting to old versions, or rewriting the same thing over and over. But let’s be real... most of the time, it’s not the model. It’s the prompt.That’s exactly why I built PromptDC.Whether you’re using web-based platforms like Lovable, Bolt, Replit, or local editors like Cursor, VS Code, and Windsurf, we’ve got you covered. Just write your prompt, hit your keyboard shortcut or the “Enhance” button, and PromptDC instantly enhances your prompt.Here’s how it works:→ Write your prompt in any supported web-based AI platform or local editor.→ Click the “Enhance” button on the text field or use your keyboard shortcut→ Your prompt is automatically replaced with the enhanced version.How Enhance Works:Based on the AI model you’re using (Cursor, Lovable, Bolt, Replit, Cline, etc.), our extension reads its system prompt, understands how that model operates, and then refines and restructures your input to make it more understandable. This helps the model generate better, more accurate results.I built PromptDC because I was tired of repeating myself. One click should be enough to get the result you asked for.If you’ve ever been frustrated by endless rewrites, misunderstood requests, or just want to save yourself a few keystrokes (and headaches), PromptDC is for you.Chrome Extension Works With:Lovable, Replit, Windsurf, Bolt.new, V0, Devin.ai, Manus, ClackyAI, PageAI, Softgen, Rosebud.ai, Base44, Samen.new, TempoVS Code Extension Works With:Cline, CopilotCursor Extension Works With Cursor :DTrae Extension Works with Trae :DNEW: Prompt - Markdown LibrarySave and organize your prompts & markdown files in a private library, or discover and use prompts shared by the community.

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Maestro logo

9. Maestro

Maestro is a powerful open-source automation framework designed to simplify end-to-end testing for both mobile and web applications. With intuitive syntax, fast test execution, and seamless cross-platform support, Maestro enables developers and QA teams to create reliable, maintainable tests without the usual complexity.

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AVA Palettes logo

10. AVA Palettes

AVA Palettes is a Figma plugin that generates accessible color palettes instantly.Key features include:Perceptually Uniform Ramps: Creates visually consistent color ramps using OKLCH color space.WCAG & APCA Checks: Ensures color palettes meet accessibility standards with built-in contrast checkers.Pro-Level Control: Offers advanced customization options for fine-tuning color palettes.Ideal for:UI/UX DesignersWeb DevelopersDesign System TeamsAVA Palettes stands out by leveraging modern color science (OKLCH) to create beautiful and accessible palettes, ensuring brand consistency and compliance with accessibility guidelines.

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