You're already spending several thousand dollars or more to get your small business off the ground, or maybe keep it afloat. My guess is that a fair chunk of that change is going toward tech products and services. On top of that, you need mission-critical software. Unfortunately, programs like Microsoft Office and QuickBooks can be bank-account breakers.
Fortunately, open source software is here to save the day. This is software that often has the same features as commercial software, but it's free. I know, it sounds too good to be true, but it really exists and is a great way to reduce business overhead.
Microsoft Office has been the productivity workhorse for business, home and student users for more than 20 years. The more expensive versions include Outlook and Microsoft Publisher in addition to Word, Excel and PowerPoint.
Instead of MS Office, try LibreOffice, which contains a word processor, spreadsheet program, presentation software and much more. It borrows its design heavily from older versions of Office so it should be familiar. Even better, it can open and save Microsoft Office documents, and with each release it gets faster and more Office compatible.