There are some excellent time-tracking apps out there, but if you prefer the comfort of good old Microsoft Excel, here’s some good news. A Redditor made an Excel-based to-do list with built-in time tracking, and the template is free to download.
from https://is.gd/vM6Lzc
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Since the end of September 2010, a group of German OpenOffice volunteers left definitively the project to join the The Document Foundation and develop a fork version of the famous free productivity platform now controlled by Oracle. After 
just few months we have LibreOffice: a (more or less) new cross-platform productivity software based on OpenOffice version 3.3 beta. We compared both the free suites and apparently we did not notice particular differences in features and tools. Also the graphic interface is similar between the two platforms and the buttons position is the same. At the moment LibreOffice supports less languages in its Linux and MAC OS X versions and it is not compatible with Solaris based PCs. Both the productivity platforms are able to use the OpenOffice extension library. Consequently, it is clear that it’s too early to notice relevant technical differences between the two competitors but, for sure, something will show off in the next versions. In fact LibreOffice has been created to guarantee a vendor independent office suite which can be developed with no copyright software chunks. The goal is prestigious and we can only say, Good Luck LibreOffice! 
Just a quick reminder to add a text/word watermark in OpenOffice Word Processor or Microsoft Word:
In OpenOffice Word Processor
a- Create an image using GIMP
– insert a Text field
– choose your favourite font, size, colour (25-30% grey is suggested)
– use the “Rotate Tool” to rotate your text to 45.00 degrees
– save the file in a light graphic format (e.g .gif)
b- Create the watermark
– open OpenOffice Word
– go to Insert —> Picture —> From File and select your graphic file
– click on the image using the mouse’ right button and select Wrap —> In Background
– Done!
– Go to Format
– Select Background and choose Printed watermark
– Click on Text Watermark
– Type “Your Text Here”
– Select Diagonal and then click OK
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