Oracle SQL Developer
#Tools>Preferences>Environment
Encoding : UTF-8
#Tools>Preferences>Database>NLS
Date Format : RRRR-MM-DD"T"HH24:MI:SS".000"
Timestamp Format : RRRR-MM-DD"T"HH24:MI:SSXFF3
Timestamp TZ Format : RRRR-MM-DD"T"HH24:MI:SSXFF3TZR
#Tools>Preferences>Database>Utilities>Export
Pretty Print : Checked
Terminator : Checked
Add Force to Views : Checked
Encoding : UTF-8
#Tools>Preferences>Database>Utilities>Import
File Encoding : UTF-8