ProTexting - ProTexting offers mobile marketing tools for businesses to communicate with their audience via SMS & MMS campaigns.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Clickatell - Simple, reliable mobile messaging cloud.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
ShoutOUT - All in one business texting tool to send personalized alerts, promotions, reminders, short links and marketing campaigns, for any SMEs (hotels, restaurants, education, non profits, Woocommerce, banks, healthcare, agencies, supermarkets, weddings)
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.