EssentialPIM

EssentialPIM is the award-winning, absolutely free personal information manager that makes it easy to control your appointments, to-do lists, notes, email messages, password entries, and contacts. In addition to that, EssentialPIM Free offers portability, speed, an intuitive interface, and the ability to synchronize all your information with Android and iOS devices. Supported by a large community of users, EssentialPIM Free has been widely acknowledged as the best personal information management system on any desktop or USB flash drive.

Features and Highlights

Cloud. Integrated
Unprecendent synchronization features with all popular cloud services including Google Calendar / Contacts / Tasks / Drive, iCloud, Toodledo, SyncML, CalDav, and many others. Native Dropbox support is also included.

Cross-linking
Link any items with any other items in this program. It is your data, inter-connected. Link your appointment with the people you meet and the tasks you have to do before you meet them.

Reliable security
Your data can be encrypted using an advanced industry-standard AES (Rijndael) 256-bit key, which is considered a modern and secure solution used by governments and agencies worldwide.

Global search
This tool can become your data silo but will never let you drown in information. Never lose any bit of information by searching for it through the whole database in a matter of seconds.

Sticky notes
Still, using those little yellow post-it notes? The software offers integrated sticky notes to turn any note into a sticky one!

Open-source database
The program uses the open-source Firebird database engine. This means that all the data is yours. No proprietary formats, no lock-in. You can even write plugins and applications to work with your data the way you like.
 
Printing. Same data, multiple printouts
Group, limit, hide, and add data - all that is possible with flexible and easy printout reports. Any data in the software can be printed in multiple layouts.

Multi-user database access
Need to collaboratively work with others? You can do that with EssentialPIM Pro Network. Assign access rights and let everyone share their calendar, contacts, to-do lists, notes, and even password entries with other members of the workgroup.

Storing and linking to external attachments
Essential PIM will store any external files attached to items (appointments, notes, tasks, etc.) you need to keep handy. You can also choose to link to external files saving some database space.

Note: Limited functionality in the unregistered version.