Links

Glasgow Airport movements site
Most of this site is taken up with some pretty comprehensive movements reports and lots of interesting photos from Glasgow. Also includes a timetable (scheduled and charter flights), frequencies and a resident aircraft listing.

AvInfo
Very good viewing and photography information for Glasgow contained on the 'UK Airport Guide' page.
The main site is mainly concerned with Birmingham airport, with other sections including a very comprehensive collection of links to worldwide airline and airport homepages, a huge listing of IATA/ICAO airline/airport codes (unfortunately searchable only by code and not by name), a large photo gallery (mostly taken at Birmingham, Manchester or Heathrow, and generally fairly good quality). Very useful resource.