APEL stands for "A Portable Emacs Library" and contains these modules:
apel
- alist: utility for Association-list
- calist: utility for condition tree and condition/situation-alist
- filename: utility to make file-name
- install: utility to install emacs-lisp package
- mule-caeser: ROT 13-47-48 Caesar rotation utility
- path-util: utility for path management or file detection
emu
- broken: provide information of broken facilities of Emacs.
- invisible: provide features about invisible region
- mcharset: provide MIME charset related features
- pces: provide portable character encoding scheme features
- pccl: utility to write portable CCL program
- pcustom: provide portable custom environment
- poe: emulation module for basic functions and special forms/macros
- poem: provide basic functions to write portable MULE programs
- static: utility for static evaluation
