DEVONthink, CherryTree, TiddlyWiki, OmniOutliner, MediaWiki, TreePad, Tree Notes, KeepNote, Memento, Notesnook, Zettlr, Trilium Notes, StoneNotes, CrossLine, RedNotebook, reQall, Nextcloud Notes, KeyNote NF, TreeDBNotes, Vimwiki, Ecco Pro, TreeNotes, Wiki on a Stick, myBase, My Notes Keeper, synapsen, ATWiki, RightNote, Sorting Thoughts, Tomboy, VoodooPad, Sec Notes, nvPY, Cryptee, Hiro, OutWiker, ConnectedText, Scribbleton, Equil Note, Mars Notebook, Noteliner, OutlineEdit, FiiNote, Forensic Notes, Omni Notes, nimblenote, Auratikum, Growly Notes, Visual Outliner, NoteCase Pro, AM-Notebook, Somnote, Linked Notes, ThinkingRock, neutriNote, Zettel Notes, SlimWiki, Dashword, Jot+ Notes, LabLog, Notekeeper, MemoMaster, Yojimbo, glimpses, TiddlyDesktop, GloboNote, footnote, YesWiki, Fish Code Library .NET, Catzwares Simple Notes, Woas, MyTetra, Ghostnote, MarkWiki, MemoPad, Teamemo, Incollector, WebResearch, ZuluPad, NotesHolder, minipad2, BrainStormWFO, Foliaro, DashNote, QuotePad, Gubb, Jottit, Exstora, NotePub, Qollector, Piggydb, Tinderbox, Jreepad, Flick Note, NotesSync, Nottingham, Shelfster, Smart Notes, Delphinus Notes, OnlineNotes, Encryptic, Backpack, Noteshare, iNotepad, Note Monger, Knotable, Spines, CUEcards, All My Journals, GavelNote.com, Memonic, Wikipack, Stack for Mac, Oinker, Swiftnotes, Book on a Stick, CrocodileNote, Malkovich, Ciphernote, OpenNote, Luminotes, Qbase, Note-C, Gruik, Inkiness, Notefish, Fetchnotes, LeafNote, Springpad, TexNotes, Symphonical, MiniTD, Webfolder, ActionPad are some alternatives to WikidPad.