cronbot is a wrapper script for cron jobs. Rather than running your job/script directly, you run it through cronbot, and it will allow a little more control to help keep things from getting out of hand. The default behavior is to only allow one instance of your job to run. This can be changed with the --duplicate option. You can also pass in a maximum time of execution for a job or add a random amount time to delay the start of your job. By default, jobs are run with a default "nice" value, which is usually 10.
ssh-ident allows you to have a single line in your .bashrc, then let it take care of loading ssh-agents when first needed, load all the necessary keys, and share ssh-agents across login consoles. If you have multiple identities for the same account, it is able to load different keys depending on the host you connect to or the path you are working from. At the same time, it keeps the ssh-agents separated and forwards only the keys which are needed for the specific host. It also allows you to specify ssh-add options, so you can automatically lock keys which are unused for a certain time, or have a confirmation request every time a specific key is used.