an awesome list of internet services that don't require logins or registrations
A curated list of awesome internet services that normally you would have to register for, but due to clever approaches on the part of the service you can use without registering, creating an account and filling endless forms.
See also https://github.com/aviaryan/awesome-no-login-web-apps for a more comprehensive list, probably better.
img
tags to contain response, retina-compatible charts. image-charts.com offers a similar service with many types of charts, graphviz graphs, animated GIFs and QR codes from an URL, works also as a drop-in replacement for Google Image Charts. quickchart.io is specialized in charts and can render some pretty ones, and also QR codes.echo 'something' | nc seashells.io 1337
Please contribute! Open a PR and we'll discuss it or merge it. If you're opening a PR, please ensure all formatting is ok.
Criteria for including: the app must be a service, i.e. something that doesn't run in the browser itself, something that provides value that only a remote server can provide.