RayCalc

Utilities include:
Metric Converter.
Distance and Climb Distance calculator.
Turn Radius based on speed and bank angles.
Arc Distance: radial to radial entries.
Approach Checks: Designed for both Chart Producers and Pilots in mind. Includes:
-Glidepath Distances.
-Glidepath DME Altitudes based on published FAF.
-Metric Conversion of QFE altitudes for Glidepath values.
-Glidepath Angle qualification.
-Glidepath Altitudes Distance.
-TCH Verification from geo-calculated published sources.
-Glidepath speed/rate of descent Table.
Approach Minima: EASA/Pans-Ops options, for pilots and approach plate qualifiers.
Takeoff Minima: EASA/Pans-Ops options.
Vnav Checks: Gradient related verification and ROD Table with optional GS for your very own Vref.
Barometric Altitude Temperature Correction using standard ICAO formula.
Distance Turn Anticipation for Departure standards (Terps).
Distance Turn Anticipation for Approach standards (Terps).
Bearing and Distance from 2 Lat/Longs (short/long formats); auto Magnetic declination derivation.
Cost Index: just for fun, airline pilots get this from bean counters.
Weather: Metar and TAFs from NOAA, plus others and maps for global weather overview.
Misc Calculations.
Notam Parsing & Filtering.