Download The File Archiver ARJ
From here, you can download ARJ 2.70 by clicking on one of the following: 
ARJ 2.70 Current release for world-wide users (primary site)  (about 450 Kbytes) 
ARJ 2.70 Current release for world-wide users (secondary site) 
From here, you can download the PREVIOUS ARJ 2.60 by clicking on one of the following: 
ARJ 2.60 Previous release for world-wide users (primary site) 
ARJ 2.60 Previous release for world-wide users (secondary site) 

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Download The File Archiver ARJ32
From here, you can download ARJ32 by clicking on your choice: 
ARJ32 3.03 Current release for world-wide users (primary site) 
ARJ32 3.03 Current release for world-wide users (secondary site) 

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Download The File Archiver JAR
From here, you can download JAR by clicking on your choice: 
JAR 1.02 Current release for world-wide users (primary site) 
JAR 1.02 Current release for world-wide users (secondary site) 

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Download UNARJ
This is UNARJ version 2.43. This archive contains a simple ARJ archive extraction program and the C source code for the program. UNARJ.EXE may be freely used and distributed. 
UNARJ 2.43 Primary site  (about 60 Kbytes) 
UNARJ 2.43 Secondary Site