Usually to solve some problem you need to install the program. It is not always convenient, especially if you don't have administrator's permissions. Then you can use portable versions of programs.
This is autotranslated version of this post.
NirLauncher collection of more than 200 useful portable utility for Windows.
Utility itself, of course, requires no installation and can be run from any removable media.
All the programs available in the launcher is free and does not contain any spyware or adware. The list is updated manually by the developer. To see the entire list at this link.
For example, you can find utilities for password recovery, network monitoring, data management, browser and more.
If a program is not listed, you can add it in NirLauncher and use in the future. Experienced guys can launcher in BartPE and use the utility on the Live CD.