Meta Search - Search your Desktop, Google Drive, Dropbox, Gmail, Evernote.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Findo - Your smart search 🔍 assistant across personal cloud ☁️
Standard Notes - A safe place for your notes, thoughts, and life's work
FYI - Find your documents, like magic 🔮
Joplin - 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, tagged and modified either from the applications directly or from your own text editor.