Efficient Diary is described as 'elegant, easy-to-use and powerful electronic diary software package'. There are more than 100 alternatives to Efficient Diary for a variety of platforms, including Windows, Android, Online / Web-based, iPhone and Mac. The best alternative is Joplin, which is both free and Open Source. Other great apps like Efficient Diary are Standard Notes (Freemium, Open Source), Evernote (Freemium), CherryTree (Free, Open Source) and Zoho Notebook (Free Personal).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.
RedNotebook is a graphical diary and journal helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export functionality and word clouds. You can also format, tag and search your entries.
Colorful & powerful sticky notes app for Windows & Phones. Set reminder alarms, attach them to any website or document, organize them using folders/tags, sync sticky notes between devices & send notes across LAN or to any contact across the globe.
The notes app for creative work. For the research, thinking and planning behind your next great piece of work. # Collect your thoughts Milanote is a place to put it all together. See your ideas, notes and research side by side.