Pinger is a website/service that I was recently made aware of. Basically it's a service you sign up for that lets you send people voicemails. You call the number they give you and say who you want to leave a message for. Then you record a message and your recipient gets a text message letting them know they have a pinger message. They are then able to call and check the message.
I like this because sometimes there are times I want to call somebody to let them know something, but I don't really want to or have the time to have a conversation. I haven't yet decided if this Pinger thing is a good idea. It's more personal than a text message but possibly less convenient and definitely less personal than an actual phone call where I "risk" having to talk to the person. So if you get some text saying you have a Pinger message, you know what it is.