Kid Pix Studio Deluxe 🎨, released in 1998, is something I grew up using on school computers and on my mom's Mac. At its core, it's a paint program, but packed with a surprise and delight that's missing from a lot of modern software design. Regardless, it's fucking fun and I want everyone to be able to experience it.
For more background, I highly recommend reading Craig Hickman's personal history of Kid Pix and watching Just Another System's recent interview with Hickman about the unexpected legacy of Kid Pix.