As it says on the website, EteSync is a secure, end-to-end encrypted and journaled personal information synchronization for Android. I created this project for two main reasons. The first is that I'm very privacy conscious, and then second, is that I version control almost all of my data, and I really wanted to version control this as well. Think Git for your contacts, calendars and etc.
Feel free to ask me anything, and please share any feedback you may have.
In addition to general feedback, I also have two specific questions: 1. Does the website easily explain what EteSync does? Even to less technical people? 2. I'm still trying to come up with a short tag-line that represents what EteSync is. My current favourite is: Full history, fully yours, only yours. But I feels a bit wrong. Can't explain exactly why.
P.S. both client and server are open source.