Open Office is the free equivalent Microsoft Office. Its not as advanced as Microsoft Office but its awesome program if your just doing normal documents and spreadsheets.
GlassWire is a great program to use if you want to monitor your network usage. GlassWire allows you to see actually what program is using how much data and when it used it. You can also block network access to programs to that it won’t use up all your data.
7Zip opens archived folders so that you can use them. It is able to open almost any archived files like 7z, XZ, BZIP2, GZIP, TAR, ZIP, WIM and many more. You can also create a archive file with 7Zip if you wanted.
“PowerISO is a powerful CD / DVD / BD image file processing tool, which allows you to open, extract, burn, create, edit, compress, encrypt, split and convert ISO files, and mount ISO files with internal virtual drive.” You can also create a bootable flash drive from Windows ISO files to reinstall Windows.