File Splitters

Chop
TAssembly Language program for splitting large files (up to 4GB) for easier distribution. Files can be split by either the number of files specified, the maximum file size, or use preset common sizes for floppies and CDs.
http://www.sinnercomputing.com/Chop.htm

File Split Program - Datei-Zerstückelung
Splits a large file into smaller pieces, uses Cyclic Redundancy Check (CRC), and auto-concatenate. [Bilingual site German/English]
http://black_giant.tripod.com/splitfile.html

Gair Software
Utility for splitting large files into several smaller parts, developed for the Microsoft .NET platform.
http://www.freewebs.com/gairsoft/

Goetz's File Splitter
Split a large file into smaller files to fit on floppies or e-mail attachments. Command-line tool.
http://www.lawrencegoetz.com/programs/gfsplit.htm

SplitIt!
Macintosh freeware to split a file into pieces of any size then reassemble it.
http://www.cs.utk.edu/~hedden/split.html

Splitpea
Command-line tool written in Python that can split a file into multiple fixed-size pieces and join those pieces to form the original file. Runs on Linux and Windows. GPL from dOxxx.
http://www.doxxx.net/