Carolyn's Creations Classic and beloved site: breeds, tutorials, babyz, oddballz in petz. Seperate downloads for petz 3/4/5.
Vickie's Petz Zoo (Internet Archive) Also has many cool breeds, all unibreed.
Improved Original Breed Index
mazzlabs petz 4 site with free graphics and colorful funky psychelic breeds and other downloads. This site was actually what got me back into petz after many years, when I happened to see it on Neocities one day.
Kalium's Petz Place Some pokemon and other fun breeds
firstname.lastname@example.org Some miscellanous hexed things released under a CC0 license
New Lambda Extremely cool montrous alien petz based on the Half-Life series.
Faepetz - Faewolf's Petz Archive Some very cool wildz in here, archived from lost petz sites.
[BAD_DEATH]Cool breeds, like a mimic, an actual treasure chest.
RKC Petz Forum threads:
Hexing catz to be Tricksters @ Corrupted Kibbles.
Unique Petz Has a Mad Science section, as well as some good guides/tutorials.
pastylabz: Generates LNZ data
Petz SCP Reader
petz-common: Common routines for petz utilities
Petz file formats
ScreenToGif is very good.
Online HTML Code Editor
Difference between alt text and title text of an image.
Stack Overflow: Finding unclosed tags in HTML
Stack Overflow: How to put all the images in a folder in an html file, using the Command Prompt in Windows. More info about batch scripting.
98.css - A design system for building faithful recreations of old UIs.
GifCities from the Internet Archive
Under Construction gifs
One Terabyte of Kilobyte Age: Digging through the Geocities Torrent
Project with links to two real-time glitter shader demos
Interactive font generator demo
The Most Unwanted Song (full audio with score) - YouTube
Gradient color palette generator. Explanation: Mastering Multi-hued Color Scales with Chroma.js
Gradient generator. Another useful tool.