Mémoires is described as 'The easiest journaling software for Mac. Saving your memories and returning back to them has never been so enjoyable before. Simple and Beautiful' and is a Journaling App in the Education & Reference category. There are more than 100 alternatives to Mémoires for a variety of platforms, including Windows, Android, iPhone, Mac and iPad. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Evernote. Other great apps like Mémoires are CherryTree (Free, Open Source), Zoho Notebook (Free Personal), Trilium Notes (Free, Open Source) and Cryptee (Freemium, Open Source).
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.
Notezilla is the leading sticky notes app for Windows, Android, iPhone/iPad and the web. Set reminders to sticky notes, Pin sticky notes, attach them to websites, docs & folders, sync between PCs and other devices, organize using folders and tags.