UninsHs (Uninstall for Inno Setup)
This extension program for Inno Setup allows you to add repair, modify and remove support to your applications with minimal effort. It is very small because use Assemble.
Easily creates Portable Application Descriptions (PAD) files for all your applications. Use PAD to get all of the important information to your vendors and webmasters as quickly and as concisely as possible.
PatchWise Free is a FREE powerful patch generator helping to create instant patch package for software upgrading or file updating. The package is a small size self-extracting executable file in famous installer style. It also can be distributed via the Internet. As regards to meet the demand of upgrading or updating frequently, it is absolutely a good solution.