This site provides a free tool to test your webcam online and check if it is working properly. In other words, you can test it directly from your browser without the need to install third-party software. Despite such an easy way, you can start testing your webcam “in one click” on different devices, including laptops, smartphones, TVs, tablets and others. Regardless of the device and the operating system, as a result of testing, you will not only know if your webcam is working, but also find out a lot of useful information about it (i.e, webcam name, resolution, frame rate, number of colors, image quality and many other specifications). In addition, if the testing tool detects any problems with your web camera, you will receive some hints on how to fix them. After completing the webcam testing, among other things, you can take photos with your webcam and download them. Also you can view it in fullscreen and rate your webcam.
This website provides a simple online mic test that allows you to check if microphone is working properly. Since it’s a browser microphone test, you don’t have to download or install any third-party software. Moreover, even if it may seem too simple, MicTests.Com will test your microphone regardless of its type or the device and operating system you are using. And to surprise you even more, this mic test will display a lot of useful information about your microphone (for example, its name, number of audio channels, latency, sample size and sample rate, as well as if it supports echo cancellation or noise suppression). In addition, if the tester will detect any problems with your microphone, you will receive tips on how to fix them.
Turn a Raspberry Pi into an oscilloscope. Probes attach to the GPIO pins.
A site that tests the capabilities of the VPN you're using for privacy leaks.
A service that logs into XMPP servers and tests their compliance with various XEPs. Generates a visual map of compliance on a categorical grid. You have to give it a user account on the server so it can log in and run tests. You do /not/ have to add your server to the public roster!
There is also a command line tool in Github.
A website that can extract many different sorts of information pertaining to IP addresses and networks, least of all querying several dozen blacklists to see if an address has been flagged as a spammer's.
Along with NIST SP800-22rev1 (statistical analysis of pseudo-random number generators), the Statistical Test Suite can be used to actually perform the tests outlined in this document. Runs under Windows, Linux, and Mac OSX. Written in C.
How to test an ejabberd.cfg file before restarting the server. Easier than it seems - why not make it a shell alias?
cat ejabberd.cfg | erl | grep syntax
If that command returns a syntax error line, you know there is a problem in the config file. If there is no output, ejabberd.cfg parses correctly.
Plug an XMPP server or client into this site and it'll audit certain aspects of its COMSEC posture, such as key sizes, whether or not crypto is enabled, and what crypto protocols it supports. If you're paranoid about instant messaging, you may wish to start by using this site.
A website that tests to see if arbitrary URLs are accessible from within China (behind Golden Shield/The Great Firewall).