Email-Marketing.me

HTML Email Analyzer
HTML Email Analyzer checks the HTML email for possible rendering and SPAM issues.

Anti-Spam Blacklist
Anti-Spam Blacklist Thing lets you check to see if a given IP address or hostname is on one of up to 20 different anti-spam blacklists.

ASAP Utilities
A great MS Excel plugin for tidying up spreadsheets. Convert all to UPPERCASE; Remove all after n’th character;  and much much more. Free version is for non commercial use only!