I built a few calculators for games without a scoring track:

• 7 Wonders Duel score calculator (includes Pantheon expansion)
• 30 Rails score calculator
• A Feast for Odin score calculator
• Cascadia score calculator
• Kingdomino score calculator
• Lost Cities card game score calculator
• Wingspan score calculator

My Targi solo automa / bot uses the official solo rules (with optional house rules):

• Targi solo bot

Assistant for 2-player Onitama (you still need the 5x5 grid and pieces to play):

• Onitama assistant