I don't want to update certain packages. But this list of packages appears every time I open update manager. Is there an ignore list feature for packages? So I can add or remove packages from ignore list whenever I want?
Then you need to do an apt-pinning, to prevent future updates:
Create a new file in /etc/apt/preferences.d/ (if Ubuntu >= 10.4) named after your program, with following entry:
assuming, you know that your programs version, you want to freeze, is 1.2.3
1 - Go to Synaptic Package Manager
2 - Enter [package name] into the search field
3 - Highlight the installed package
4 - Click on Package on the top row
5 - Select Lock Version
Done, now [package name] will no longer be updated.