Here is a list of all files with brief descriptions:

[detail level 123]

include
beecrypt
aes.h	AES block cipher, as specified by NIST FIPS 197
aes_be.h
aes_le.h
aesopt.h	AES block cipher, assembler-optimized routines, headers
api.h	BeeCrypt API, portability headers
base64.h	Base64 encoding and decoding, headers
beecrypt.h	BeeCrypt API, headers
blockmode.h	Blockcipher operation modes
blockpad.h	Blockcipher padding algorithms
blowfish.h	Blowfish block cipher
blowfishopt.h	Blowfish block cipher, assembler-optimized routines, headers
dhies.h	DHIES (formerly known as DHAES or DHES) encryption scheme
dldp.h	Discrete Logarithm domain parameters, headers
dlkp.h	Discrete Logarithm keypair, headers
dlpk.h	Discrete Logarithm public key, headers
dlsvdp-dh.h	Diffie-Hellman algorithm, headers
Doxyheader
dsa.h	Digital Signature Algorithm, as specified by NIST FIPS 186
elgamal.h	ElGamal algorithm
endianness.h
entropy.h	Entropy sources, headers
fips186.h	FIPS-186 pseudo-random number generator, headers
gnu.h
hmac.h	HMAC algorithm, headers
hmacmd5.h	HMAC-MD5 message authentication code, headers
hmacsha1.h	HMAC-SHA-1 message authentication code, headers
hmacsha224.h	HMAC-SHA-224 message authentication code, headers
hmacsha256.h	HMAC-SHA-256 message authentication code, headers
hmacsha384.h	HMAC-SHA-384 message authentication code, headers
hmacsha512.h	HMAC-SHA-512 message authentication code, headers
md4.h	MD4 hash function
md5.h	MD5 hash function
memchunk.h
mp.h	Multi-precision integer routines
mpbarrett.h	Multi-precision integer routines using Barrett modular reduction, headers
mpnumber.h	Multi-precision numbers, headers
mpopt.h	Multi-precision integer optimization definitions
mpprime.h	Multi-precision primes, headers
mtprng.h	Mersenne Twister pseudo-random number generator, headers
pkcs1.h	PKCS#1 utility routines
pkcs12.h	PKCS#12 utility routines
ripemd128.h	RIPEMD-1128 hash function, headers
ripemd160.h	RIPEMD-160 hash function, headers
ripemd256.h	RIPEMD-256 hash function, headers
ripemd320.h	RIPEMD-320 hash function, headers
rsa.h	RSA algorithm
rsakp.h	RSA keypair, headers
rsapk.h	RSA public key, headers
sha1.h	SHA-1 hash function, headers
sha1opt.h
sha224.h	SHA-224 hash function, headers
sha256.h	SHA-256 hash function, headers
sha2k32.h	SHA-256 and SHA-224 shared constants, headers
sha2k64.h	SHA-512 and SHA-384 shared constants, headers
sha384.h	SHA-384 hash function, headers
sha512.h	SHA-512 hash function, headers
timestamp.h
win.h	BeeCrypt API, windows headers