This is a simple program to uuencode/decode, available for PPC  and 68k.
It's public domain and distributed with source.

It has a standard AmigaOS interface, this is the program template:

FILE,A=ENCODE/S,X=DECODE/S,TO=DEST/K

Support also stdin for decoding and stdout for the encoding (useful with pipe)

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                17657   48248  36.6% -lh5- 400b May  2  1998 gguucode
[generic]                 3779   11840  31.9% -lh5- 786c May  2  1998 gguucode.c
[generic]                  541    1402  38.6% -lh5- e170 May  2  1998 gguucode.¶
[generic]                  294     537  54.7% -lh5- f33d May  2  1998 gguucode.¶.info
[generic]                  304     458  66.4% -lh5- 5dea May  2  1998 GGUUWOS.readme
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         5 files   22575   62485  36.1%            May  3  1998