Allows you to add custom widget content on a post-by-post basis from the edit post screen.
The My Snippets plugin allows you to define custom widget content on a per-post basis from the edit post screen.
While the plugin is both simple and powerful, it'll never replace such plugins as Widget Logic and Widget Context nor is that the plan. What it does is allow you to add custom widget content from the edit post screen without having to go to your Widgets screen in the admin for additional configuration.
If you need professional plugin support from me, the plugin author, you can access the support forums at Theme Hybrid, which is a professional WordPress help/support site where I handle support for all my plugins and themes for a community of 40,000+ users (and growing).
If you're a theme author, plugin author, or just a code hobbyist, you can follow the development of this plugin on it's GitHub repository.
Yes, I do accept donations. If you want to buy me a beer or whatever, you can do so from my donations page. I appreciate all donations, no matter the size. Further development of this plugin is not contingent on donations, but they are always a nice incentive.