DITA2Go

Omni Systems is the developer of DITA2Go, which outputs from DITA maps to a dozen other formats, including HTML, XHTML, MS HTML Help, JavaHelp, OracleHelp, Eclipse Help, Word, DocBook, and even WinHelp. It is free for unemployed and underemployed tech writers and pubs consultants, as well as educational users (students, faculty, and staff), most nonprofits, and FOSS developers and documenters. For commercial use, it is reasonably priced at $295 per seat, with steep discounts starting at five seats. Annual support and all upgrades are included for the first year, and $75/year thereafter.