Best dx calculator
http://faculty.vassar.edu/lowry/clin1.html
For just LR .
http://www.quesgen.com/Calculators/CIforLR/CIforLR.html
Confidence interval of a proportion
http://faculty.vassar.edu/lowry/prop1.html
http://www.dimensionresearch.com/resources/calculators/conf_prop.html
Vanguards EBM Guideline Project
LR c CI Calculator