I use mostly Paint Shop Pro, which is a low-cost program, not requiring
a recurring subscription payment, and the excellent Kolor Autopano Pro
for combining multiple images. Image management is with PIE (Picture
Information Extractor). Free software I use includes JPEGcrop (lossless
cropping) and GeoSetter for geo-tagging.
I very rarely take RAW, preferring to get the exposure right in the
camera. I run on Windows, so some of these packages may not be available
for your OS.