I wrote SageMathCloud's collaborative online latex editor. Like ShareLatex, it's collaborative and 100% open source. There's a docker image for very easy pers

I wrote SageMathCloud's collaborative online latex editor. Like ShareLatex, it's collaborative and 100% open source. There's a docker image for very easy personal hosting. SageMathCloud tracks all changes with a "TimeTravel" button for browsing history. You can click a "changes" button and get a range slider to see the exact changes (and who changed them) between any two points in time, with a display similar to github's diff view. It has split pane editing so you can edit two parts of the same latex document at once, along with forward and inverse search. There's also a full terminal (and Jupyter notebooks), in case you want to mix latex with computation/data, or want to use rsync, git, etc.