An online questionnaire to help you estimate the cost of building a software-only MVP for a web or mobile app. Note that the final screen includes a lead generation tool for a no-code platform, but you can use the 'traditional agency model' estimate as a reasonable expectation for outsourced development costs.
Open source tool (it is part of the Google Chrome web browser) that can be used to audit your website for issues with performance, accessibility, SEO optimization, and more. It offers detailed recommendations for every issue identified.
An excellent collection of resources for starting, operating, and growing a SaaS business. Modules on finding product/market fit and SaaS pricing for low-touch and high-touch markets are particularly worth reading.
A simple website to help you test your web page unfurls on the major social networks; Facebook, LinkedIn, Twitter, and Pintrest. Includes a few checks to make sure your content is optimized for each platform.
Website recording tool - visualize your users' flow through your site to optimize for increased conversions or whatever is key to your business. Free tier supports 35 recordings per day and has a 1,050-recording-per-month limit.