The brainfuck compiler knows the following instructions:

Cmd  Effect                               
---  ------                               
+    Increases element under pointer      
-    Decrases element under pointer       
>    Increases pointer                    
<    Decreases pointer                    
[    Starts loop, flag under pointer      
]    Indicates end of loop                
.    Outputs ASCII code under pointer     
,    Reads char and stores ASCII under ptr

Who can program anything useful with it? :)

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 1301    2863  45.4% -lh5- bbec Jun  9  1993 readme
[generic]                  229     240  95.4% -lh5- c102 Jun  9  1993 bfc
[generic]                  811    1848  43.9% -lh5- 4779 Jun  9  1993 bfc.asm
[generic]                 5575    9264  60.2% -lh5- 660c Jun  9  1993 bfi
[generic]                  557    1047  53.2% -lh5- 9d3a Jun  9  1993 bfi.c
[generic]                  178     461  38.6% -lh5- 7bbc May 21  1993 src/atoi.b
[generic]                  160     379  42.2% -lh5- 05fd May 21  1993 src/div10.b
[generic]                   67     187  35.8% -lh5- 9379 May 26  1993 src/hello.b
[generic]                  154     272  56.6% -lh5- 2d9d Jun  9  1993 src/mul10.b
[generic]                  884    4100  21.6% -lh5- 58f3 Jun  1  1993 src/prime.b
[generic]                  173     282  61.3% -lh5- 18ff Jun  1  1993 src/varia.b
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        11 files   10089   20943  48.2%            Jun  9  1993