This app was mentioned in 2 comments, with an average of 1.00 upvote
sadly in order to utilize qslide an app has to use this sdk: http://developer.lge.com/MOBILE_HELP/index.jsp?topic=%2Flge.mobilesdk.lgqslide.api%2FDocuments%2Finstallinglgqslidesdk.htm
meaning, you cannot add random apps there. only the ones using this sdk
https://play.google.com/store/apps/details?id=com.zero.qslide.notes this is the only third party app i found that uses it.
https://play.google.com/store/apps/details?id=com.zero.qslide.notes
Can you install this? I'm afraid they really removed it (it's no longer in lg developer kit)