Archives (also known as Compressed files), are a single file
which works like a folder, containing many other files, which
are under compression, which reduces their file size. Archives
are a file format, a binary file which ends with an extension
telling what type of archive it is. Many different archive
formats exist, each with differing compression ratios. Different
programs also have different compression rates. In order to
compress (add to) or decompress (open) an archive, you must have
a supporting program. - 7-zip - The pioneer of the lzma (7z)
compression format, the most widely used in the Glest community,
this cross-platform program is open source and supports
decompressing most archives and can compress to many popular
archive formats. - ARK - A cross platform, open source
compression and decompression program which is defaultly bundled
with most KDE operating systems, and supports most archive
types. - WinRAR - The RAR format is less commonly used in the
Glest community, and it can be opened by 7z