Upload an image and data that you'd like converted into a QR code, and the site will combine the two into a QR code that can also be read by a scanner. Animated images are possible by using this service to upload individual frames which can then be stitched back together into an animated .gif or .png.
Online barcode decoder from the ZXing project.
Banana Split uses Shamir's secret sharing to make your paper backups more resilient and secure.
After you type in your secret into Banana Split, it will be encrypted with a autogenerated passphrase and split into N QR-codes, ready to be printed out. You'll need N/2+1 of those printouts to reconstruct the secret, and then the passphrase to decrypt it.
Banana Split tries to protect your secret from the attack vectors like "attacker is able to intercept everything you're sending to your printer", and that's why you'll have to write down the passphrase on your printouts by hand.
Banana Split is a self-contained HTML page, and should only be opened from your local Documents folder, while browser is in the Offline mode — this way the risk of compromise will be minimal.
Recovery can be done on any device with a webcam — just show your QR codes to the webcam and follow the notifications on screen in the process.
Saved to Keybase.
Rewtro is a weird retro game engine inspired by fantasy consoles and code golf that runs games encoded in a very small amount of data (2kb/3kb). This way is possible to share games using exoteric and usually data inefficient ways: i.e. sticking some PWA magic and a QR-Code reader to the engine I've made a fake gaming console for mobile devices. Games are coded using JSON structures. Includes tools for more easily building such games.
Application for transferring files to mobile devices. Throws up a QRcode in a terminal and spawns a web server. Scan the code, download the file.
Give the web application on this site a URL, some text, a phone number, or an SMS code and it'll generated a 2d barcode called a QRcode, which you can save as a .png file to use as you like. Good for stickers, business cards, and other ways of making some data machine readable and scannable.
A URL shortening service for posting links to Twitter, identi.ca, or any other service you like. There is even an option to generate a QRcode out of a URL.
A QRcode that some facial recognition software manufacturers have opted to honor. It links to the tagmenot.info website to signify that you don't want pictures of you to be tagged after being run through facial recognition software.
However, the site also says that it's possible to pick people out of pictures as unusual /because/ they're wearing this QRcode.