Power is sweet; it is a drug, the desire for which increases with a habit.
Bertrand Russell - 1951
Bertrand Russell - 1951
PIM and Contact Management
Essential PIM
Powerful, full-featured email client and organizer for Windows with portability (run it from a USB stick).
https://www.essentialpim.com
https://www.essentialpim.com/download-free
Open Contacts
Open Contacts is an address book with CRM features.
http://www.fonlow.com/opencontacts/
http://www.fonlow.com/opencontacts/Download.htm
Mozilla Sunbird - Portable Edition
Sunbird Portable is a standalone calendaring and task management application.
https://portableapps.com/apps/office/sunbird_portable
Note: Development discontinued.