From Markus Winter:
Do you have a print-out of your sequence with the position of the primers penciled in?
Are you using Excel to maintain a list of your oligos?
Have you just moved from working on one gene to working on a similar one and wonder which primers you can still use for your PCR?
Do you subclone and rearrange sequences and somewhere along the line lost track on which primer to use where?
Have you started in a new lab, inherited a box of oligos and a folder full of printouts that came with them but no information on what they were ordered for?
Have you ordered and waited for primers because you don't know which of the ones available you can use with your sequence?
If any of these sound familiar then OligoChecker might be for you.