SpreadsheetConverter HTML Std
Converts spreadsheets to web pages that work like Excel. Sends forms via e-mail.
Okdo Xls to Ppt Converter
batch convert xls to ppt with fast speed and good quality.
VeryUtils Excel Converter Command Line
veryutils excel converter command line converts xls, xlsx, ods, xml spreadsheets
Excel Converter
Convert Excel file to WAB, Lotus Notes, blackberry etc
Save XLS to XLSX
save xls to xlsx format applying fully technical approach