Check back frequently, this post will be constantly updated as I remember to add things!
Missing that early-SL look? Outworldz has tons of free textures and resources intended for OpenSim users. Low-resolution.
has some fantastic, high res textures. However, you must give attribution that links to their webpage somehow.
Normal Map Generator
Just drag your image in and get a normal map out. Uses the light and dark areas of an image to guess where normals should be.
Drag in your gltf file, texture, and .bin file to test or view your model.
Photoshop alternative. Although GIMP is notorious for its horrible UI and crashing, it’s really improved in the past few years. Great for quick manipulations. Cross-platform (Windows, Mac, Linux)
3D modeling. UI is difficult for beginners, but a free and open source alternative to Maya.
Maya and other Autodesk software is free for students with an .edu email. You get new versions of the program for 2 years, but you own the version of the program you get for life. Other restrictions apply.
Blender glTF Exporter
An alternative to .fbx for imported objects in High Fidelity. glTF is my format of choice for mesh objects.
I am making a tutorial on how to set this up soon.
24hr temporary storage. Great for prototyping.
Digital Ocean Spaces
Free for the first 60 days. Easy to use. Max 250gb before overages apply.
5GB free for a year. Not as easy to use.