calibre-kobo-driver VS kobopatch

The challenge here is that you would have to go through the plugin releases for the KoboTouchExtended plugin and find one that is old enough to still be compatible with your version of Calibre.

OP probably just means stuff like kobopatch [ https://github.com/pgaskin/kobopatch ] or Calibre plug-ins that are handy to work alongside the Kobo, such as this extension to the KoboTouch driver [ https://github.com/jgoguen/calibre-kobo-driver ]. I personally don't use kobopatch, but the extension for Calibre's KoboTouch driver has been v useful for me.

kobopatch v0.15.1 https://github.com/pgaskin/kobopatch Loading configuration from kobopatch.yaml Reading input firmware zip Patching ./usr/local/Kobo/libnickel.so.1.0.0 Applying overrides ... APPLY `Allow USB storage even when device locked` SKIP `Allow rotation on all devices` SKIP `Allow showing info panel on random screensaver` APPLY `Always show confirmation dialog before upgrading` SKIP `Block WiFi firmware upgrade` APPLY `Both page turn buttons go next` SKIP `Both page turn sides go next` SKIP `Bulgarian Phonetic Keyboard (GloHD/ClaraHD/AuraOne/H2O2/Forma/Libra)` SKIP `Change Browse Kobo home screen link target - Activity` SKIP `Change Wikipedia search language` SKIP `Custom Sleep/Power-off timeouts` APPLY `Custom font sizes` APPLY `Custom header/footer page number text` SKIP `Custom kepub default margins` APPLY `Custom left & right margins` APPLY `Custom navigation menu page number text` SKIP `Customize ComfortLight settings` SKIP `Cyrillic Keyboard (GloHD/ClaraHD/AuraOne/H2O2)` SKIP `DeveloperSettings - AutoUsbGadget` APPLY `Dictionary text font-family/font-size/line-height` APPLY `Disable all tutorial dialogs` SKIP `Don't grab exclusive access to event0` SKIP `Don't uppercase header/footer text` SKIP `Don't uppercase header/footer text and change page number text` SKIP `FeatureSettings - BookSpecificStats` SKIP `FeatureSettings - ExportHighlights` SKIP `FeatureSettings - FullScreenBrowser` SKIP `FeatureSettings - MyWords` SKIP `FeatureSettings - ShowFacebookShare` APPLY `Force user font-family in ePubs (Part 1 of 2)` APPLY `Force user line spacing in KePubs` APPLY `Force user line spacing in ePubs (part 1 of 2)` SKIP `Greek Keyboard (GloHD/ClaraHD/AuraOne/H2O2)` SKIP `Hide browser from beta features` SKIP `Increase page navigation history` SKIP `KePub stylesheet additions - text justify` SKIP `KePub stylesheet additions - word-spacing` SKIP `Larger Sleep/Power-off timeouts` SKIP `My 10 line spacing values` APPLY `My 24 line spacing values` SKIP `Never show Kobo Plus, wishlist, and points SmartLinks` SKIP `Only show Pocket SmartLink` SKIP `Only show stats SmartLink` SKIP `PowerSettings - UnlockEnabled` APPLY `Remove beta features not supported text` SKIP `Remove line from bottom tab bar` APPLY `Remove recommendations (row1col2) from home screen` SKIP `Remove title from reading header/footer` SKIP `Rename new home screen footer` SKIP `Replace adobe page numbers toggle with invert screen` SKIP `Set KePub hyphenation` SKIP `Set visible SmartLink` APPLY `Shorten dictionary entry not found message` SKIP `Swap reading header/footer` SKIP `Un-Force user font-family in KePubs` SKIP `Un-Force user text-align in div,p tags in KePubs` SKIP `Un-force font-family override p tags (std epubs)` SKIP `Un-force link decoration in KePubs` SKIP `Unify font sizes` APPLY `ePub constant font sharpness` SKIP `ePub disable built-in body padding-bottom` SKIP `ePub fixed top/bottom margins` Patching ./usr/local/Kobo/nickel Applying overrides ... SKIP `Change TOC level indentation` SKIP `Custom collection/author header title font` APPLY `Custom header/footer captions` SKIP `Custom page navigation scrubber` SKIP `Custom synopsis details line spacing` SKIP `Custom synopsis font size` SKIP `Customise Header back button` SKIP `Dictionary pop-up - increase available text area` SKIP `Increase Book Details synopsis area` SKIP `Increase headlines font` SKIP `Increase home screen cover size` APPLY `Increase library cover size` APPLY `Increase size of kepub chapter progress chart` SKIP `New home screen subtitle custom font` SKIP `Reduce new header/footer height` SKIP `Reduce top/bottom page spacer` APPLY `Remove footer (row3) and increase cover size on new home screen` SKIP `Remove footer (row3) on new home screen` SKIP `Remove forgot pin button from lock screen` APPLY `Series list increase cover thumbnails` SKIP `Show all games` ... Checking patched KoboRoot.tgz for consistency Successfully saved patched KoboRoot.tgz to out/KoboRoot.tgz. Remember to make sure your kobo is running the target firmware version before patching.

The other thing I really like is Kobopatch which lets you tinker with a number of appearance things, such as offering more, smaller, font sizes, reducing the space in the footer at the bottom of a page, and also does stuff like allowing you to block firmware updates. It's definitely a personal preference thing, but I found it pretty easy to get my head around and I like being able to mess about with that kind of thing.

I'm not a great expert on the matter, because I'm pretty satisfied with how Nickel works (I added Dropbox support, but that's not done with a patch, NickelSeries, NickelMenu and NickelClock, but the last three are proper add-ons, so no patches again), and it's been a while since I looked closely at them, but you can find more info; - on the github page of the guy maintaining them all https://github.com/pgaskin/kobopatch

OP probably just means stuff like kobopatch [ https://github.com/pgaskin/kobopatch ] or Calibre plug-ins that are handy to work alongside the Kobo, such as this extension to the KoboTouch driver [ https://github.com/jgoguen/calibre-kobo-driver ]. I personally don't use kobopatch, but the extension for Calibre's KoboTouch driver has been v useful for me.