According to this (http://netbeans.org/kb/docs/java/import-eclipse.html#versioning) knowledge base article, the nbproject folder should be checked into the VCS in order to allow people to open the project without importing.

This is a transient file generated by the Scala-IDE Eclipse plugin, which is regenerated on a clean build, and should not be checked into VCS.

Add:
 * General nanoc gitignore file

It is possible to run the project converter multiple times, which would generate new backup-directories (Backup1-Backupn) and logfiles (UpgradeLog2.XML-UpgradeLogn.XML)

gitignore files.

The behavior is documented in [1].
The prefix doesn't seem to be documented, but it is hardoced as described in [2].

[1]: http://www.gnu.org/software/emacs/manual/html_node/emacs/Interlocking.html#Interlocking
[2]: http://tekman.livejournal.com/79598.html

Environment support eliminates the need to ignore database.php.  Instead, ignore the entire development dir.
Logs and cache are now in application folder instead of system.

Ruby.gitignore

PlayFramework: Ignoring `precompiled` directory

Ignore Netbeans run configuration file

Global/Archives.gitignore

More VisualStudio rules

added .build to Perl.gitignore

Remove two vi/vim-related duplications

Wordpress.gitignore

Added .pyc to Django.gitignore

Update Python ignore

Added local properties, updated how generated files are detected, added O