SizeMe Alternatives
SizeMe is described as 'Maximize your output!' and is an app in the cd/dvd tools category. There are four alternatives to SizeMe for Windows. The best alternative is DiscFit, which is both free and Open Source. Other great apps like SizeMe are Ignition, Prepare For Burning and Burn to the Brim.
Arranges a big set of files or directories in order to use the minimum number of physical media (CD, DVD, BD...) pieces. You can drag the resulting sets directly over your burning software (Nero, DVD-go...)
Ignition is a CD/DVD burning optimizer. It helps you saving space on your media by optimizing the way files are placed on the CDs/DVDs of your set.
Prepare big collections of your pictures, comics, movies, documents for burning by splitting it into multiple directories sized to one DVD or CD.
Discontinued
The program seems to be no longer developed, but the program and the source code, released on March 2012, can be still downloaded from SourceForge.
Burn to the Brim is an open-source freeware program designed to make selection of files to optimally fill up an entire CD (or other medium).
Discontinued
Last version, 2.9.0, was released on 2004. It is still downloadable from SourceForge.