QuickBooks
Used by 12 peoplequickbooks.intuit.com ↗

“I actually find the laptop to be kind of prohibitive for photo editing but literally every other part of my job, from QuickBooks, to emails to production all goes through this mighty foldable computer.”
Aundre Larrow Interview, Visual artist · via Uses This 
“Rounding out the desktop experience, I use QuickBooks for invoicing and because it makes my bookkeeper happy and hoo BOY, do I want to keep her happy.”
Colleen Wainwright Interview, Writer, speaker, consultant · via Uses This 
“As much as it pains me I use QuickBooks 2007 for bookkeeping.”
Justin Frankel Interview, Software developer (Winamp, REAPER) · via Uses This 
“I use Ubuntu for most of my software development work (typically Linux kernel hacking), and the secondary Windows XP image is where I install "obnoxious" programs, such as Quickbooks and vendor-specific embedded development tools which require brittle, poorly tested hardware drivers to be installed.”
Andrew Huang Interview, Hardware misfit · via Uses This