Usually, remote sensing software are meant to process satellite images. So, almost they all have the functions for satellite image processing (e.g. ENVI, ERDAS, GRASS, IDRISI, etc).These days, even GIS software have the basic functions for satellite image processing. Moreover, NASA, ESA, etc. have developed apps for specific processing functions. If you can be more specific with your question, I believe that the others can provide a better answer. Cheers!

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I normally go for ArcGIS; It's easy to use, low-learning curve, and versatile.

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Carl is spot on. In the US undergraduate science students are being introduced to ArcGIS in their first or second year. It is also standard for government resource management and all kinds of urban and rural planning. It makes sense to use and train for what dominates our work environment. Its also far more useful than what you currently need it for -- my faculty used it in their research along with their students (pre-engineering, soils, conservation biology, geology, science education). I predominantly used it for geological mapping and producing digital and paper geological maps. I've posted examples.

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