Hi all,
   Sorry if this may have previously been mentioned on the list.  Maybe this is old news.
If you don't mind working with command line programs, 
this utility, rtl_fm is completely accessible for tuning the RTL2832 dongles. 


http://kmkeen.com/rtl-demod-guide/index.html

Batch files can be easily written and used for whatever frequency you'd like to monitor as well as placing the tuner into a scan or search mode. 


Quote from Website:
Rtl_fm is a general purpose analog demodulator.  It can handle FM, AM and SSB.  It
can scan more than a hundred frequencies a second.  

Here are three script examples to program the tuner:
.
Music on the Radio
.
rtl_fm -M wbfm -f 89.1M | play -r 32k -t raw -e s -b 16 -c 1 -V1 -
.
Police Scanner
.
rtl_fm -M fm -f 154.42M -f 154.75M -f 154.82M -f 154.89M -s 12k -g 50 -l 70 | play
.
Or, for searching a specific range
.
rtl_fm -M am -f 118M:137M:25k -s 12k -g 50 -l 280 | play -r 12k ...
.
Note that these scripts are case sensitive. Use capital M for dash M, mode for example.
Aside from the rtl_fm utility, the SoX, Sound Exchange, application is needed. 
I had issues with the latest version 14.4.2, so the earlier version 14.4.1 works fine. It can be found here:
.

Download from SourceForge
http://sourceforge.net/projects/sox/files/sox/

sox-14.4.1a-win32.zip
http://sourceforge.net/projects/sox/files/sox/14.4.1/sox-14.4.1a-win32.zip/download

.
After unzipping the file, rename sox.exe to play.exe in order to make the Play command work.
As with the other SDR programs, the Zadig USB driver must be installed. Info and downloads are here: 
http://zadig.akeo.ie/

.
Guess you could say I'm very pleased with this program. It has its limitations, but they're worth it.
Gud luck.
73, Bob WA1KXH