TreeSheets is a useful cross-platform tool that runs under Linux, Mac OS X, and Windows. It’s very fast in operation, and frugal with system resources. It’s designed around the notion that cells are small in size and can all be styled in a single operation.
TreeSheets offers a vast number of styling and layout options to ensure you get the right look for your purpose although it doesn’t offer any formatting changes inside a cell. For example, if a cell has 3 words, it’s not possible to apply different formatting to one of these words. And there’s no support for subscripts or superscripts which is a barrier if you want to use TreeSheets in a technical context.
When you’re finished, the final document can be exported as XML, CSV, HTML, indented text, even as a PNG image. It’s best to use a different tool if you want to print a document in separate pages, or if you need syntax highlighting for code.
We think the program is strongest as a to-do list and to store notes. For other activities, such as mind mapping, we recommend using dedicated software such as View Your Mind or Minder. And it’s too basic for project management. Take a look at our recommended free and open source project management software.