Top Alternatives to Momento

Evernote is a note taking application which keeps the notes taken in sync across all platforms using its cloud infrastructure.

Notezilla is a sticky notes app for Windows.

Joplin is an open-source free note taking and to-do application.

CherryTree is an hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

NixNote is an open source client for Evernote.

ResophNotes is a fast note writing tool and a Simplenote client on Windows.

Day One is a simple journal application for the Mac, iPhone, and iPad.

WizNote is a cross-platform cloud based note-taking client.

Leanote is a self-hosted note taking app.

Zoho Notebook takes the same catch-all approach as Evernote and OneNote, but has a few design ideas of its own.

Guide is an application that allows you create documents ("guides") which inherently have a tree (which you can modify as you please) and text associated with each node of the tree.

Diaro is designed to record activities, experiences, thoughts and ideas throughout a day and sync data across all your devices.

Journey is a journal app companion that keeps your private memories for a lifetime.

MacJournal is journaling and blogging software.

BeeCanvas is an online whiteboard based visual collaboration tool.

footnote is a very light and neat Notebook App for elementary OS.