Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
PocketGuard - PocketGuard categorizes and organizes your expenses, monthly bills and subscriptions into clear, beautiful tabs and graphs, so you will always be on top of your finances.
WLPPR - Beautiful mobile wallpapers made from satellite imagery
EveryDollar - Budgeting and expense tracking app
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Goodbudget - A home budget app based on the envelope budget system. Available on the web, Android, and iPhone.