I know that you can extract
.7z files with 7-zip.
Is there another standard linux program that can do this? Maybe one of these
tar bzip2 xz gzip
No. 7-Zip archives use LZMA and LZMA2, which are not supported by standard tools (they also use bzip2, but you still need to decode the header).
7-zip archives can be extracted with p7zip (http://p7zip.sourceforge.net/) on Linux. It is included in the repositories of: Debian, Fedora, Ubuntu and possibly other distributions too.
List contents with (lower case L, for list):
7za l myarchive.7z
7za x myarchive.7z
The "standard" way to work with 7-Zip archives on Unix is to use P7ZIP. But since the 7-Zip format was designed primarily for Windows, you shouldn't really expect
If you want the benefit of LZMA compression on Unix, prefer XZ Utils.