Who has got data to fit can use this online curve fitting site:
https://mycurvefit.com

Another one:
(https://tools.softinery.com/CurveFitter/)[https://tools.softinery.com/CurveFitter/]

Much information about different tclkits is found there: https://wiki.tcl-lang.org/page/Tclkit

What does my tclkit contain?

% info tclversion
8.5
% packages
invalid command name "packages"
% package names
rechan zlib tcl::tommath vfslib vfs::mk4 mk4vfs vfs Mk4tcl Tcl
%
# Not all packages are shown at first!  Only after trying to require an unknown package, 
# the package list is filled.
%
%  catch {package require thereisnosuchpackage}
1
% package names
Thread http tcl::tommath rechan opt tcltest mk4vfs vfs::zip vfslib msgcat 
registry zlib starkit Ttrace Tcl Itcl dde platform Mk4tcl vfs vfs::mk4

If you ever have to batch rotate some videos with a command line tool – or do anything else to some videos with a command line tool, look for ffmpeg.

• If you ever need to convert some pdf document to markdown, you might try this link: https://pdf2md.morethan.io.

• Many other Pdf tools can be used online on PDF24.org

• There is also a desktop version of all the pdf24 tools available.

It seems, they are currently destroying Thunderbird and it might be not long in the future when it is no longer usable well. I’ve been looking for an easy to use and stable mail client where the developers not constantly are changeing stuff just for fun and to annoy end users.

It may be that Claws Mail is an appropriate ersatz. Or maybe Sylpheed.

Both probably don’t support HTML Emails. Claws has a plugin that makes viewing HTML emails possible. It uses the Dillo-Webbrowser. That one is very light and small and fast but doesn’t support Javascript and maybe not all of CSS. But do you need such stuff in an email client?

Here some more info about claws in german