Viewfinder Panoramas - Unofficial SRTM data with voids corrected using topographic maps
Discussion forum for SRTM data users
Atlogis Meta-Maps: Online-Viewer for relief maps generated from SRTM-Data.
LatLonToElevation.com Free web application to extract SRTM elevation data given an input file of lat/lon coordinate pairs.
http://sourceforge.net/projects/srtm-matlab MATLAB-based SRTM reader