Expensify is the single most useful app for small business/self employeed clients. I can not reccomend it use strongly enough. Come talk to me and I can show you how it operates. NEVER lose another business reciept again.
EXPENSIFY - One-click expense reports in realtime.
This one comes highly recommended by several of my truck driver clients.
TRUCKER PATH - Find truck stops, parking, weigh stations and more
DROPBOX - Secure file sharing and storage