Looking for a cash tool

[JimR]

I am looking for a personal finance tool.  I don't think that it already 
exists in gnucash, but I could be wrong.  If I am, kindly direct me.  
Otherwise, if anybody knows of such a tool that runs under Linux, 
whether it interfaces with gnucash or not, kindly point me to it.

What I need it something that will handle short term cash flow 
projections for 2-3 months.  It would allow entry of templates for 
standard recurring income and expenses, such as salary, mortgage, 
groceries but also allow items with variable amounts or dates to be 
inserted or modified.  It would always display a running balance by 
date, alerting me when a projected balance was going negative.

It would allow me to enter ad hoc items ("oh crap, my daughter needs to 
borrow $700 this week") and modification of existing items ("I will have 
to reduce the amount I am sending to savings at the ends of the month by 
$700").  It would automatically re-sort when I changed the date of an 
item, or inserted a new item with a date in between already existing items.

In the past, I have been using Kspread, but it is awkward to always 
resort anytime a mid-month items comes up.

Does gnucash do this?  Does something else?

Thanks in advance,
Jim