Download

Source Code, MinGW and Mac OS X build

• latest

Distributions

Debian and Ubuntu

apt-get install aria2

• http://packages.qa.debian.org/a/aria2.html

Ubuntu PPA is also available. https://launchpad.net/~t-tujikawa/+archive/ppa

Fedora

yum install aria2

• https://admin.fedoraproject.org/pkgdb/packages/name/aria2

Mandriva

urpmi aria2

• http://wiki.mandriva.com/en/Aria2

Arch

pacman -S aria2

• http://www.archlinux.org/packages/extra/i686/aria2/
• http://www.archlinux.org/packages/extra/x86_64/aria2/

Gentoo

emerge aria2

• http://packages.gentoo.org/package/net-misc/aria2

OpenSUSE

• Build Service http://download.opensuse.org/repositories/network:/utilities/

Lunar Linux

lin aria2

MOPSLinux

• http://mopspackages.ru/search.php?name=aria&sdesc=&desc=&ver=

FreeBSD

• http://www.freebsd.org/cgi/cvsweb.cgi/ports/www/aria2/

Mac OS X

• http://www.macports.org/

Fink

• http://pdb.finkproject.org/pdb/package.php/aria2

Cygwin

• http://sourceware.org/cygwin/packages/aria2/

This is rather old, but aria2 is in the official Cygwin repository.