iBus - Intelligent Input Bus.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
fcitx - Fcitx ['fa?t?ks] is a input method framework with extension support.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
scim - Download Smart Common Input Method platform for free.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.