mtCellEdit is a lightweight spreadsheet program that is designed to handle simple day to day tasks. I have put the most important facilities I want into a small customized program which means I can avoid the problems of larger programs such as slow operating speeds and overcomplicated user interfaces.
ErgoTabcalc is a general calculation and report system. Calculation sequences are stored in the database. These sequences are made from simple operations on data, eg, add two table columns, or sort a table. This is similar to relational algebra.