Experiments
These are the tools I've pulled off the main shelves. Some of them probably look like AI slop, and I'd rather say that than pretend otherwise. Most started as shower thoughts I got running in an evening, and they never got a real design pass. They still work, so they're here. Expect rough edges, and tell me on Discord which ones deserve a rebuild.
actualpug
Waiting for a polish pass
These are close. They work and people use them, but they need a proper design pass before they go back on the homepage.

Gradient Generator Blend blocks into a gradient, with presets and a build guide. 
Block Palette Generator Generate an eight-block build palette from any color. 
Crafting Recipe Book Search every crafting recipe on an animated 3D grid. 
Nether Portal Calculator Convert coordinates between the Overworld and Nether. 
Mob Profiles Every mob in 3D, with stats, drops, and sounds. 
Replay Recap A Minecraft Flashback replay analyzer: drop a replay .zip and read your session. 
Armor Trim Previewer Preview every armor trim on a 3D player. 
Banner Studio Make banners from A-Z and 0-9 presets or design your own. 
Note Block Lab Compose note-block songs and export a schematic that plays. 
Mob Sound Editor Replace vanilla mob sounds and export a resource pack. Back on the drawing board
These need more than polish. They will be rebuilt, and some of them may change a lot along the way.

Build Extractor Scan a world save and export every build as a schematic. 
Paint Studio Paint a stroke, get a wall relief in slabs and stairs. 
Command Generator Build Java Edition /give and /summon commands. 
Fireworks Lab Design firework rockets and copy the Java command. 
Structure Roller Roll random vanilla structures with real jigsaw rules. 
Adventure Map Draw any Java seed, or your own world save, as a hand-inked fantasy atlas. 
Cottage Map Draw any Java seed as a hand-illustrated storybook map poster, ready to print.
Mob Quiz Show A TV-style mob trivia board for up to four teams.
Mob Millionaire Climb 15 mob-trivia questions to a million points. 
Mob Pose Studio Animate mobs, players, and blocks, then export a video. 
Armor Stand Skin Converter Turn player skins into armor-stand statue textures. 
Mob Voice Recorder Voice any mob yourself, then export a resource pack.