HoN Mod Manager

To install the program download the zip file linked below containing the program. You can place it anywhere you wish. Linux and MacOS users need Mono to run it.
The program will try to detect the location of your Heroes of Newerth install automatically; if it can't it'll ask you for the folder (usually something like "C:\Program Files\Heroes of Newerth").

To install mods (*.honmod files) put them into the mods directory (see below for locations) or drag them onto the program window (Windows only). Any mod files in that directory that are compatible will automatically show up in the program.
To use installed mods you need to enable them first (e.g. by double-clicking on them), then select "Apply Mods" from the "File" menu. You'll need "Apply Mods" each and every time the game was patched or you have installed/uninstalled/updated any mods. The program will remind you of this.

The default locations for the mods directory are:
Windows: C:\Program Files\Heroes of Newerth\game\mods
Linux: /home/<username>/.Heroes of Newerth/game/mods
MacOS: /Users/<username>/Library/Application Support/Heroes of Newerth/game/mods
This directory will be automatically created when you launch the mod manager the first time and can be easily be accessed from the "Open Mod Folder" option in the "File" menu.