DEVONthink, CherryTree, Milanote, TiddlyWiki, Memento, Notesnook, Trilium Notes, Wiki on a Stick, wikidPad, Tomboy, VoodooPad, Cryptee, OutWiker, OpenJean, Zoho Notebook, Linked Notes, Fish Code Library .NET, Woas, ZuluPad, SOHO Notes, Foliaro, Tinderbox, Book on a Stick, Luminotes, Qbase, Springseed, Notefrog, LeafNote, Fastwiki are some alternatives to MyTetra.