You can export user defined snippets from your database in a format you can send to other CodeSnip users who can then import them into their user-defined database.
Use the Database | Export Snippets menu option to create an export file and use the Database | Import Snippets menu item to import a file someone else has sent you.
Imported snippets will be located in the user-defined "Imported Snippets" category. They can be moved to other categories by opening each snippet in the snippets editor and changing its category there.