LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
iBus - Intelligent Input Bus.
Gnumeric - Gnumeric
fcitx - Fcitx ['fa?t?ks] is a input method framework with extension support.