Invoice101 - PC
Invoice 101 is a full featured small business invoice program designed for fast data entry and ease of use. The simple tab navigation, single window interface and condensed toolbars keep important features always at your fingertips. Internal relational databases track clients, customers,... Print options for invoices, receipts and installment plans include classic, top stub or bottom stub layouts with addressing aligned for standard window envelopes. ... Totals and report printouts include invoices paid, due, suspended, by date range, client, job or agent plus worksheets, product catalog...
http://programs101.com/software/inv101.exe - 9Mb - Download - Screenshot

Calculadora Inteligente
This calculator has a scrollable tape and allows you to save calculations as a text file or send them to the printer. Optional large screen display is very easy to read. Obtain the capitalized interest for installment plans, rule of three, capitalized amounts, and it even calculates your Ideal... The program supports English, Spanish and French. ... The undo function can undo and redo the last operation. ... This program reads and calculate values from clipboard and automatically saves calculations also to the clipboard.
http://www.sansoftware.net/calculadora.exe - 3Mb - Download - Screenshot

Americalculator
This calculator has bigger and better features than the Windows calculator: It has a scrollable tape and allows you to save calculations as a text file or send to printer. Optional large screen display is very easy to read. For multiple calculations, open several Americalculators and column... Obtain the capitalized interest for installment plans, rule of three, and capitalized amounts, and it even calculates dates and times. ... You can even select up to 128 different synthesized sounds when typing -- it is very simple and easy to use.
http://www.sansoftware.net/americalculator/americalculator.exe - 370Kb - Download - Screenshot