Linux
Agilia

First, you need to enable the edge repository. For that, issue
mpkg-list_rep mpkg-enable_rep repo_num mpkg-update
where repo_num is the number of edge repo in the output of mkpg-list_rep. If there is no edge repository, you need to add it manually:
mpkg-add_rep http://edge.agilialinux.ru
mpkg-updateAfter that, you can issue
mpkg search leechcraft
to see what packages of LeechCraft are available and install the ones you want, for example, for Aggregator, Azoth and Poshuku:
mpkg install leechcraft-aggregator leechcraft-azoth leechcraft-poshukuArch

LeechCraft has PKGBUILDs in AUR, so to install it, you first need yaourt:
pacman -Sy yaourtThen, just issue
yaourt -S leechcraft-gitDebian

Packages for Debian Wheezy/Sid are available in this unofficial repo. Instructions for enabling that repository could be found on the linked page.
Each LeechCraft plugin is packaged in a separate package. To install all LeechCraft plugins, just select leechcraft, the rest will be pulled automatically.
Fedora

LeechCraft is currently available in official repositories for Fedora 16 and 17.
To install all LeechCraft modules (which is recommended), issue
sudo yum install "leechcraft*"
Alternatively, you can manually install selected packages. In this case issue the following to find modules for LeechCraft you want to install:
yum search leechcraft
Gentoo

LeechCraft is available in the official Gentoo Portage tree. It is currently masked (~arch for milestones and releases, ** for live ebuilds).
To install the metapackage which would pull all the plugins available, issue:
emerge -pv leechcraft-fullto see what will be installed, and then
emerge leechcraft-full
If you prefer sets (starting with Portage 2.2), you can select any of the following loosely categorized ones:
leechcraft-clients-livefor clients for various services like SeekThru or vGrabber;leechcraft-net-livefor networking utilities and modules like Aggregator or Poshuku;leechcraft-tools-livefor various helper utilities like Summary or HistoryHolder.leechcraft-livefor all of them.
Alternatively, you could manually install every plugin.
openSUSE

Starting with openSUSE 12.2 LeechCraft is in official repositories. To install it, issue:
zypper in leechcraft*
For older versions the network repository needs to be added, so issue
zypper ar -f -r http://download.opensuse.org/repositories/network/openSUSE_12.1/network.repo zypper in leechcraft*
replacing 12.1 with your current distro version.
Alternatively, you can use official openSUSE packages search.
Slackware

Installation for Slackware is pretty simple: just download packages for your architecture (pkg for x86, pkg64 for x86_64) from our repo and install them with:
updatepkg --install-new packagenameFor running LeechCraft, you would also need qjson, which could be obtained from here: http://www.slackers.it/repository/qjson/ or be installed using slapt-get from slackers.it repository.
The source directory contains scripts for building the packages and all the required information. Documentation regarding using and modifying slackbuilds could be obtained at http://slackbuilds.org
Have fun!
Ubuntu

LeechCraft 0.5.60 and later is available for Ubuntu Oneiric and Precise. Version 0.5.0 is also available for Maverick and Natty.
Add PPA with Weekly Builds (recommended):
sudo add-apt-repository ppa:tehnick/leechcraft-unstable
Alternatively, you can use PPA with stable releases:
sudo add-apt-repository ppa:tehnick/leechcraft-stable
Update (like aptitude update) and install leechcraft via aptitude, Ubuntu Software Center, Synaptic, Muon or whatever package manager you like.
The leechcraft package pulls the full LeechCraft set. To install only parts of it, you can just select relevant plugins (they all begin with leechcraft-). If you want to help us with debugging LeechCraft, install leechcraft-dbg package.
Mac OS X

LeechCraft supports Mac OS X 10.7 and upper.
The lastest installer is for the 0.5.90-588 version, dated February 27, 2013. You can get it here.
Microsoft Windows

The latest installer is for the 0.5.80-596 version, dated September 15, 2012.
You can download the latest build from SourceForge. It should work with Windows Vista and higher. Microsoft Visual Studio Redistributable package is included, so administrative rights are required to install LeechCraft.
Other builds are also available.
Building from source
If you want the last bleeding-edge LeechCraft, you could always build from source.
