• Y Combinator Startup Library – Best resources from Y Combinator.
• YC Startup Class – Y Combinator startup class at Stanford.
• Peter Thiel’s CS183 Notes – Notes from Peter Thiel’s Stanford class.
• Andrew Chen Essays – List of essays and resources from top growth hacker.
• Growth Hackers – Community for growth-focused marketers.

• StackExchange – The right answers, from experts.
• Quora – Opinions, answers, advice from relevant people.
• Clarity.fm – A marketplace connecting entrepreneurs with top advisors & industry experts to conduct market research, get strategic business advice, or learn a specialized skill to help them grow their business.

• Information Rules – The Wealth of Nations for the information revolution.
• Nail it Then Scale It – Lean startup methodologies in a concise and actionable version.
• Zero to One – Different take on startups from Peter Thiel.
• Traction Book – A must read on building traction.
• 4 Steps to the Epiphany – The best book available on taking a new startup to market.

• Coursera – Take courses from the world’s top universities.
• Udemy – Take online courses to learn new skills.
• Udacity – Take courses from universities and companies like Google.

• Stanford eCorner – Video lectures from top startup founders.
• Andreessen Horowitz Podcast – Startup podcast from one of Silicon Valley’s top VC firms.
• This Week in Startups – Tech entrepreneur J. Calacanis hosts discussion on startup news.
• Tim Ferriss Show – Business, productivity and self-improvement podcast.
• Mixergy – Learn from proven entrepreneurs.

• Mattermark Daily – Curated entrepreneurship & investment newsletter compiled daily.
• Founder Weekly – Weekly newsletter for entrepreneurs featuring best content and resources.
• HN Digest – Regular emails with the top the Hacker News stories.
• Email1k – A free 30-day course to double your email list from top startup marketers.

• Foundrs – Co-founder equity calculator.
• Startup Commons – Co-founder agreement template and other useful stuff.
• Meetup – Go to meetups in your city and meet potential partners, customers etc.

• Angel List – Top angel investing platform and startup network.
• Captable.io – Model your dilution.
• CapRally – Find contact details of any VC.
• CrunchBase – Most comprehensive database of the startup ecosystem.

• Tilt Open – Self-hosted crowdfunding and pre-orders.
• Kickstarter – The world’s largest funding platform for creative projects.
• IndieGoGo – Global crowdfunding for creative and technology projects.

• Sequoia Grove – Advice and documentation from the world’s leading VC.
• Pitch Envy – Browse pitch decks from famous companies.
• SlideShare – Host your pitch-deck.

• GoAnimate – Make professional animated videos.
• Animoto – Create music videos for selected images and pictures on the web.
• PowToon – Create free animated video explainers.

• SquareSpace – Build a beautiful website, accept payments.
• Unbounce – Create and A/B test your landing page.
• LaunchRock – Viral ‘coming soon’ page.

• Skype – Low-cost international calling rates and plans.
• Grasshopper – Run your business using your cell phone.

• Google Drive – Powerful option when used with Google docs.
• Dropbox – Keeps your files safe, synced, and easy to share.
• Amazon Cloud Drive – Unlimited cloud storage to backup files from any device.

• Wave Accounting – Free invoices, credit card payments, accounting & payroll.
• Xero – Online small business accounting software.
• QuickBooks – Simple small business accounting software.
• Tradeshift – Web-based business network and free invoicing platform.

• BranchOut – Utilizes your Facebook network to find your inside connections.
• InternMatch – Hire top talent from every university across the country.

• Stripe – Web and mobile payments, built for developers.
• Braintree Payments – Like Stripe, but with more country options.
• Square – Process credit cards in the real world.

• Pipedrive – Helps you focus on the right deals, great for small teams.
• Nimble – Best features of high-end CRM systems combined with the power of social media.
• Salesforce – CRM and cloud computing leader.

• Geckoboard – Real-time dashboard,  instant access to your most important metrics.
• Ducksboard – Hundreds of integrations, easy-to-use, and well-documented.
• Leftronic – All your key metrics in one place.

• IdeaPaint – Single-coat, roller-applied whiteboard paint to turn your wall into whiteboard.
• Whiteboard / Corkboard – Good for brainstorming and kanban.
• Post-it – Can be helpful, especially if you use kanban.

• Coach.me – Accountability, tracking and coaching for any goal.
• Sleep Cycle – Tracks your sleep patterns and wakes you up during light sleep.
• Evernote –  Easy note taking and archiving.
• Wunderlist – To-do, reminders and errands.
• Examine.com – Independent, unbiased source on nutrition.

• Slack – All your communication together in one place.
• iDoneThis – Simple team performance management.

• Asana – Keeps your team organized, connected, and focused on results.
• Trello – Digital kanban board for project management.

• Piktochart – Create easy infographics, reports and presentations.
• Infogr.am – Create infographics & online charts.
• Visually – High quality on-demand visual content.

• Google Consumer Surveys – Market research that’s fast and accurate.
• TypeForm – Create beautiful, next-generation online forms and surveys.
• Survey Monkey – Create polls and survey questionnaires.
• PickFu – Cheap and instant market feedback polls with A/B testing.

• Betali.st – Show your startup to an audience of 28,744 early adopters.
• Earlibird – Start a campaign to reach a global community of early adopters.
• Product Hunt – Discover the latest mobile apps, websites and technology products.
• r/Startups – Share your startup.

• pr.co – Publish & track (social) media-friendly online press releases in minutes.
• Help a Reporter Out – Reverse pitch journalists, get free publicity.

• Hubspot –  Inbound marketing to attract visitors, convert leads, and close customers.
• Marketo –  Marketing automation to help marketers engage customers and prospects.

• Amazon SES + Sendy App – Send newsletters, 100x cheaper.
• Mailchimp – Newsletters and email marketing widgets.
• Sendgrid  – Send transactional emails triggered by web apps.
• Vero - Behavioural and transactional email marketing.
• Autosend.io –  Send trigger-based emails, SMS, and push notifications to your users.
• SparkPost – Developer-friendly transactional email service.

• Optimizely – One optimization platform for websites and mobile apps.
• Apptimize – Mobile A/B testing for iOS and Android.
• Taplytics – Mobile A/B testing, optimization and marketing automation.

• Mixpanel – Advanced mobile and web analytics.
• Google Analytics – Industry-standard web analytics – free.
• Kissmetrics – Customer intelligence and analytics.

• Intercom – Customer communication made simple.
• Olark – Live chat widget.
• Qualaroo – Customer insights.
• Helpscout – Web-based help desk designed for a great customer experience.

• Buffer App – Social media publishing & analytics.
• Facebook Custom Audiences – Target your ads to a specific set of people.
• Klout – Social media & influence analytics.
• Rival IQ – Competitor analysis.

• Moz - SEO software, tools and resources for better marketing.
• QuickSprout – Complete website analysis.

• Perfect Audience – Facebook, Twitter, Web and Mobile retargeting.
• AdRoll – Retargeting and performance marketing.
• Retargeter – Full-service display advertising solution, retargeting and audience targeting.

• SumoMe – Tools & widgets to grow your website’s traffic
• BuzzSumo – Analyze what content performs best for any topic or competitor.
• Zapier – Connect web apps you use to move your data and automate tasks.
• SpyFu - Download your competitor’s most profitable keywords and ads.