I love great tech tools that help me do my job more effectively and in less time.  If you have any tools that help you do a better job of landlording (especially long-distance), or property management, or analyzing deals, I'd love to know about them.  The whole category of "#PropTech" aims to improve the experience for both landlord and tenant.  That can only be a good thing.  

A few I've come across:

• rentometer.com and the pro tools on BP are fantastic
• LeaseHawk.com for multifamily
• SmartRent.com for property managers