QuikCalc Amortization Professional Ed. 

Mortgage and loan software includes the powerful Amortization Schedules Plus! feature that allows you to override, skip or add any number of payments. Also allows actual loan and payment tracking as well as payment projection. Includes many reports.
mortgage loan calculator software financial quikcalc slateboard amortization

Account&See Invoicing 

Account and See Invoicing creates professional invoices, auto-repeating invoices and quotations via printer or e-Mail. Full Sales Ledger options including payment tracking, Sales Tax and comprehensive sales reports with Mailing Label options.
invoicing billing invoice accounting email invoices mailing labels business accounts pricing finance repeat invoices estimating estimates

LoanAmortizer Enterprise Edition 

Loan and mortgage amortization tracking tool suitable for business use. Can also be very useful in any household with active loans. It also accommodates actual date and payment amount tracking. Fiscal year selection and manual amortization
loan amortization mortgage amortization loan management apr loan charts