varies really.. depending upon the simplicity of the task, time frame in which it's needed and complexity/power of the app.
so, for me.. some apps can be done in php, no problem, quite fast to turn around and nice that you can deploy it to local and remote servers.
for windows apps, for speed, visual c#, you can turn around quick apps with this that look fairly good, but I find not too good for the more grunty processing heavy stuff nor security (c# does a lot of the work for you, making life very easy)
If i need the more processing hungry windows app and want to make it more secure, then it's visual c++ - this can take longer, but that maybe down to the fact I only use it for these sort of apps that take longer to develop/test etc
there is then also c whenever I'm coding for linux and c or assembly for embedded stuff
there is always javascript and macros for really simple stuff too...
I've never used it myself, but many bots etc are made with Ubot studio
Si