Name this links script?

Does anyone know what links directory script is powering these websites?

(replace XX with tt)
hXXp://www.justartist.com/submitsite.htm
hXXp://www.onlyhealthy.com/submitsite.htm
hXXp://www.greatthailand.com/submitsite.htm
hXXp://www.weddings-direct.co.uk/submitsite.htm
hXXp://www.indexwholesale.com/submitsite.htm
hXXp://www.studying2.com/submitsite.htm
hXXp://www.asiarealestatemarket.com/submitsite.htm
hXXp://www.roaddrive.com/submitsite.htm

TIA

 

Custom or edit of phpLD?

 

Thanks for the suggestion VentureOnline

I had thought of phpLD as well but it isn't it.

phpLD uses submit.php to submit a link and all of these use submitsite.htm

This script is all over the net but I can't locate the source