I decided to start this because I noticed a comment from way back in the beginning from DJ Omnimaga that I never really answered/noticed:

Sounds interesting. I wonder what kind of sprite stuff you plan to add. I think you should go with some features that other APPs like xLIB doesn't have, because xLIB, Celtic III and Doors CS 7 already do a lot of stuff and if your library only does a small portion of what those apps do, those apps kinda obsoletes your lib, while if you add even more stuff, people might see your lib as an alternative. I think that it would be cool if you added sprite masking, grayscale (using two sprites like in Axe and everytime you use a certain command, the checkered pattern is inverted).

It would also be nice if you had a tilemap feature that displayed maps which has their map data stored inside pics and allow pixel-testing from pic data. In Illusiat 6, 7 and 9 through 12, all map data is stored inside pics, but I am forced to recall the pic on the graph screen to pxl-test it.

-I am not sure that I will be able to get gray scale working because the app only has control when the sum( command is used.
-Sprite masking is definitely something I can do.
-I can also try to create a tilemap routine that reads tile data from pictures, however, I only plan to let it use one picture at a time.
-That pxl-test idea is a really neat idea that I think I want to implement. In fact, I think I want to make a command that lets you draw in pictures, too, not just the screen. Pretty much, I want to extend all of the drawing routines in BatLib to be able to use a picture file instead of the graph screen.

Thanks DJ!

So, if anybody has any ideas, please feel free to post. I may not be able to add it now, but I couldn't add DJ's features, before. Now, a few months later, I have the skill required.
EDIT: Wow, it looks like I missed even more!

Suggestion for a feature: Extend the Delvar command so it can also delete archived variables, pictures, lists, matrices and strings. Also do you have a command that checks if a list already exists?

Sheesh, I wish I would have payed attention. Um, I can add those without a problem. In fact, it would be pretty easy.
To determine if a list exists or not, using command 41 returns ".BAD NAME" in Ans if the var doesn't exist. This doesn't work with named lists, yet, so I will need to modify that, but it works with lists like L1. (Actually, you can get it to work, but the process is slightly complicated).
Deleting a var will be fairly easy.

Alternate base arithmetic and other mathematical operations would be nice for a BASIC app.

I wonder if chaining between both apps could be possible?

At the moment, BatLib can chain with any other parser hook, however, if another APP uses the same RAM, then there will be problems. I recently found that Axe does not work well with BatLib, so I am going to adjust some RAM locations. Also, I have the Delvar command made and I have the Picture drawing finished, so I think I will make an update soon...

Edit: I have to fix the pixel test function for command 56 and 62, but once I find the error, I will make a release... The new functions are:
60-DelVarArc
     Deletes a variable whether in archive or RAM
61-DrawRectVar
     Draws a rectangle (using the same syntax as command 29-Rectangle), but draws to the variable, not the graph. So if you use sum(61,"Pic1",0,48,0,32,2 you would invert the upper left quarter of Pic1
62-DrawToVar
     Uses the same drawing functions as command (56-Draw) to draw directly to a variable.

Note that the last two were aimed at drawing to pictures, but other vars can be used, too. However, when drawing to a named variable, the variable type MUST be included before the name.

I also recently found a bug in command 41 that doesn't seem to like archived variables (it crashes when used on an archived variable, usually).

If that is directed at me, my font hooks only modify the large font (at the moment), but they will still be in affect while an axe program is running. However, Axe and BatLib don't seem to get along well at the moment, so as soon as Axe is ran, exiting it will crash the calc (it uses one or multiple of the same spots in RAM as BatLib).

However, disabling BatLib hooks by doing sum(0,50,51will let you safely use Axe. Then, you can compile your programs and reactivate BatLib so that you can use the font hooks

Also, the main menu in BatLib is not finished, but in the readme I explain what I intend for it to do. It is going to be a hook manager, hopefully, that lets you install, uninstall, chain, or change the priority level of hooks.

Gah, I have to work on that menu system...

Hmm, I could add hooks for that, yes, but it isn't added yet.

Ahh, this isn't a programming language, it is like Celtic 3. This just modifies the regular OS command "dim("

However, when I do get back to work on command 40 (BASIC ReCode), it uses "." as the start of a comment... BASIC ReCode is a programming language, but I am pretty sure it doesn't work anymore.

I do plan to add assembly mnemonic support in BASIC ReCode.