There's no need to sift through a pile of job-specific calculators anymore. Electronics is an electronic reference application with a myriad of features:
Color-coding calculators for both resistors and capacitors
IEC conversions for resistors (SMD) and capacitors
Conversions for capacitor coding systems
Calculations for both resistors and capacitors
An extensive help resource for precisions and voltages in resistors and capacitors
An interactive common discrete semiconductor reference
USB info | 
