New Song: Hell Below
Standing over a supervolcano in tennis shoes — and what Yellowstone's fragile ground has to say about the courage it takes just to live.
I'm Larry (Danna) Collins Jr.
Software developer (C#, SQL, .NET). Live bluegrass musician. Vintage computer collector. I build things that are useful, play things that are loud, and collect things that are old.
Featured tools
Sudoku
Classic 9×9 Sudoku with five difficulty levels, five visual themes, pencil-mark notes, and a hint counter. Mobile-friendly, works offline.
Play nowDice Games
Multiplayer Yacht and Farkle in the browser. Host a session, share a QR code, and play from any device in real time.
Play now6502 Debugger
Write 6502 assembly in the browser and watch it run. Full assembler, step execution, live registers and flags, hex memory inspector. C64 compatible.
Open DebuggerRecent posts
All posts →New Song: Imposters
A business meeting, an ancient parable, and a song about the things that dress up as wins or losses — and how slowly the difference reveals itself.
New Song: Wolves Came Home
A song about the 1995 Yellowstone wolf reintroduction — the howl that came back, and what the land did with it.
Tools
Interactive web demos I use myself. SQL helpers, regex testers, games, and more.
Tips
Pro tips in C#, SQL, JavaScript, and 6502 assembly. Stack Overflow-style, searchable by tag.
Vintage
My Commodore 64 and vintage computer collection. Hardware history, personal notes, growing 6502 projects.
Music
Live bluegrass with friends. AI-assisted songwriting with Suno. Videos and tracks.