MailStore - MailStore Home - A 100% free single-private-user desktop solution
Webgility - Accounting, Bookkeeping and Inventory Automation for Retailers & Brands
Gmvault - Backup the emails in your Gmail account.
Multiorders - Shipping and Inventory Management Software is easy way to save time.
Got Your Back - Got Your Back (GYB) is a command line tool that backs up and restores your Gmail account.
SellerCloud - SellerCloud is a multi-channel inventory and order management system.