Premium Resources for Developers
Cheat sheets, prompt toolkits, and business templates built by the same people who write the guides. No fluff — just tools that save you time.
Popular Products
AI Prompt Toolkit for Developers
150+ battle-tested prompts for ChatGPT and Claude. Code generation, debugging, reviews, testing, DevOps, architecture — organized into 8 categories with copy-paste templates.
Get it on Gumroad →Developer Cheat Sheet Bundle
20 comprehensive cheat sheets covering Docker, Git, Linux, Nginx, TypeScript, Python, Kubernetes, SQL, regex, security, and more. Searchable, copy-paste friendly.
Get it on Gumroad →Freelance Contract & Agreement Vault
15 ready-to-use legal templates: services agreements, NDAs, SOWs, retainers, kill fees, and more. Fill-in-the-blank format with clause explanations.
Get it on Gumroad →Notion Freelancer Business Hub
Complete Notion workspace: CRM, project management, invoicing, meeting notes, content calendar, financial dashboard, and weekly reviews. 12,000+ word guide included.
Get it on Gumroad →More Resources
Linux Server Administration Cheatsheet
16-section reference covering users, permissions, systemd, networking, Docker, SSL, security hardening, backups, performance tuning, and troubleshooting playbooks.
Get it on Gumroad →Cold Outreach Vault
100+ proven email templates, LinkedIn messages, and follow-up sequences for freelancers and agencies. Organized by industry, goal, and situation.
Get it on Gumroad →SaaS Launch Playbook
Step-by-step from idea validation to your first 100 customers. Pricing strategy, MVP planning, launch day timeline, and customer acquisition playbook.
Get it on Gumroad →Budget Dashboard
Pre-built Excel spreadsheet for personal and freelance finances. Income tracking, expense categories, monthly summaries, and visual charts.
Get it on Gumroad →Debt Payoff Calculator
Excel-based debt payoff planner with snowball and avalanche methods. Visualizes your payoff timeline and total interest saved.
Get it on Gumroad →FAQ
What format are the products in?
Most products are delivered as Markdown + PDF. The spreadsheet products (Budget Dashboard, Debt Calculator) are Excel files. The Notion Hub is a Notion template you duplicate to your workspace, plus a PDF/Markdown guide.
Can I get a refund?
Yes — if you're not satisfied, reach out within 30 days for a full refund. No questions asked.
Do I get updates?
Yes. When we update a product, all previous buyers get the update for free through Gumroad.
Can I use these for my team?
Each purchase is a single-user license. For team use, contact us at hello@cortexcove.com for volume pricing.