Well, I use kmymoney2 for personal finance. It is lightweight, and not that fully featured, but I like the look. It does require X though. Don't know of any non x finance packages. I use moneydance, well, my wife and I do for her bussiness, where checks, online, etc is important.
You can try
to find MANY apps, but as for leightweigt, you will have to find that on your own.