I’ve put decades of business planning expertise into LivePlan, published by Palo Alto Software. Easy to use for financial forecast, simple summary, full plan, lean plan, and everything in between. It’s a web app, available everywhere, updated constantly, the descendant of my business plan software from my original templates in 1984, to Business Plan Toolkit from 1988, to Business Plan Pro from 1995, and LivePlan since 2011.