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Tomato Timer - TomatoTimer is a flexible and easy to use online Pomodoro Technique Timer
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Tasklog App - Tasklog App is an agile productivity software designed to meet the needs of current world freelancers.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
YAPA - Pomodoro timer