In no particular order. Year is when the last major work on it happened and more for my own overview than supposed to be really useful.<br>
There are also some tools on my GitHub: <a href='//github.com/lgommans'>github.com/lgommans</a><br>
<br>
<strong>Diagnostic tools</strong><br>
2019 <a href='ip'>ip/</a> Reports $_SERVER[REMOTE_ADDR]<br>
2020 <a href='inet'>inet/</a> Connection stability tests<br>
2021 <a href='speedtest'>speedtest/</a> Low-tech connection speed test, crude and inaccurate, more of a PoC<br>
2018 <a href='slomotest.htm'>slomotest.htm</a> Object moving at a fixed speed to measure slow-motion or frame rate<br>
<br>
<strong>Services</strong><br>
2021 <a href='//dro.pm'>dro.pm</a> link shortener, pastebin, file uploader in one. Shortest links ever.<br>
2016 <a href='presentation-feedback/'>presentation-feedback/</a> Presentation feedback tool<br>
2016 <a href='series-counter/'>series-counter/</a> Tiny tool to keep track of where you were<br>
2018 <a href='cau'>cau/</a> Content-addressed URL<br>
2017 <a href='topstack/'>topstack/</a> An endless feed of interesting questions from StackExchange<br>
<br>
<strong>Calculators</strong><br>
2019 <a href='pwd-combinations.html'>pwd-combinations.html</a> Calculate entropy given password requirements<br>
2017 <a href='pwd-scrambler.php'>pwd-scrambler.php</a> Allow a trusted person that should not know the password to log in<br>
2020 <a href='tiny/g-force-distance-calculator.php'>tiny/g-force-distance-calculator.php</a> g-force calculator (made for use on r/TheExpanse)<br>
2022 <a href='tiny/bpm-to-kwh.htm'>tiny/bpm-to-kwh.htm</a> Calculate current draw from electricity meters<br>
<br>
<strong>Web security</strong><br>
2020 <a href='cors-checker.htm'>cors-checker.htm</a> Checks if it can fetch stuff from another page<br>
2020 <a href='csp-test.php'>csp-test.php</a> Allows you to set a content-security policy header for testing purposes<br>
<br>
<strong>Miscellaneous</strong><br>
2017 <a href='rnd/whenimg.php'>rnd/whenimg.php</a> Countdown image to be included in another website<br>
2019 <a href='tiny/polar-tcx-garmin-converter.php'>tiny/polar-tcx-garmin-converter.php</a> Fix TCX files to make them portable from Polar to Garmin<br>
2020 <a href='hangman-solver/'>hangman-solver</a> Solves hangman games<br>
2021 <a href='badgravity/'>badgravity</a> Fly a spacecraft in orbit<br>
2021 <a href='typing-speed/'>typing-speed</a> See which keystrokes or words take you the longest<br>
<br>
<strong>Internal</strong><br>
2024 <a href='compat/'>compat</a> Check the web server; I keep this here so I am reminded this exists and remember to use it when I move to a new server