todo.txt (http://todotxt.com/ http://todotxt.com/). It works from the command line, has mobile apps, syncs nicely with ssh / dropbox, and saves into a simple to

todo.txt (http://todotxt.com/ http://todotxt.com/). It works from the command line, has mobile apps, syncs nicely with ssh / dropbox, and saves into a simple to read / port text file.