This is the index page for 30-39 The library.

31 Apps and utilities

• 31.01 Built for the system

  Here's a list of apps and utilities built specifically for the Johnny.Decimal system. Want to add yours? Email me at hello@johnnydecimal.com.

• 31.02 Other useful tools

  Here's a database of apps that people find useful. Want to submit an entry? Fill in the form.