TreeSheets is described as «The ultimate replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases» and is a very popular Note-taking tool in the office & productivity category. There are more than 25 alternatives to TreeSheets for a variety of platforms, including Windows, Mac, iPhone, iPad and Android. The best alternative is Microsoft OneNote, which is free. Other great apps like TreeSheets are NoteLedge, Freeplane, XMind and FreeMind.TreeSheets alternatives are mainly Note-taking Tools but may also be Mind Mapping Tools or Todo List Managers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of TreeSheets.