To be fair, he's describing the tools that worked for him. Scrivener is for taking stories from notes through first draft; it's not a word processor in the same way Word and LibreOffice are, and there's no direct free software equivalent. You could use free tools for the same tasks, but you'll do those tasks differently--and that might be preferable to you, depending on how you work. Scrivener is very powerful, very flexible, and very idiosyncratic.
Vellum is similar, but there are direct free software equivalents, most notably Sigil, a GUI ePub creation tool. Alternatively, you could use Pandoc to assemble an ePub from Markdown (or any of the seemingly several thousand other markup dialects Pandoc knows). I ended up using Vellum for my book because it was incredibly smart about taking a DOCX file exported from Scrivener and turning it into a properly sectioned and tagged ePub, and adding new sections, artwork, metadata and overall book styling is trivially simple. Sigil and Pandoc are great, but they're also lower-level tools by comparison, with both the advantages and disadvantages that implies. For me personally, it was worth spending $30.
Self-publishing is also free or should be.
Well, it's as free as you want it to be. In my experience, YMMV and all other appropriate disclaimers, producing an ebook which seriously competes with ones from traditional publishers requires skill not just in writing but in editing, graphic design, typesetting (or ebook production), and (depending on the cover) illustration. If you have access to all those skills without spending any money, awesome, but it's kind of a tall order.
Vellum is similar, but there are direct free software equivalents, most notably Sigil, a GUI ePub creation tool. Alternatively, you could use Pandoc to assemble an ePub from Markdown (or any of the seemingly several thousand other markup dialects Pandoc knows). I ended up using Vellum for my book because it was incredibly smart about taking a DOCX file exported from Scrivener and turning it into a properly sectioned and tagged ePub, and adding new sections, artwork, metadata and overall book styling is trivially simple. Sigil and Pandoc are great, but they're also lower-level tools by comparison, with both the advantages and disadvantages that implies. For me personally, it was worth spending $30.
Self-publishing is also free or should be.
Well, it's as free as you want it to be. In my experience, YMMV and all other appropriate disclaimers, producing an ebook which seriously competes with ones from traditional publishers requires skill not just in writing but in editing, graphic design, typesetting (or ebook production), and (depending on the cover) illustration. If you have access to all those skills without spending any money, awesome, but it's kind of a tall order.