(!!!) the one and only bookmark manager that works for me. why? ask my brain, i don't know.

list/grid view, folders. as for cards in grid view: only preview, page's name and site's adress, nothing more.

has both archive and trash bin. so you can move old (but still cool!) bookmarks from your view without deleting them.

multiplatform: yes quick: yes colorful: no works offline: yes

(!!!) widgets are EXTREMELY helpful, and there are plenty of them!

all kinds of graphs and statistics to actually see the progress. it's rewarding.

you can archive some habits if you need. they will be hidden, means less distraction.

also, you can turn on optional rest/pause days without loosing a progress. for example, making a pause with sport while you're sick. it's only fair to take your time.

it has two modes for habits: yes/no type and measured type. i like this separation. helps with priorities.

i especially love "X times per week" regime ("yes/no" type). it leaves some freedom for rest without anxiety or guilt.

plus, optional small notes for any day if you want. ^w^

multiplatform: no quick: YES! coloful: yes works offline: yes

suggestion from the comments: Grit Habit Tracker

looks similar, but i didn't try it: Table Habit

to use together with Suntimes or instead of it. it contains more information, but dashboard is flexible (you can remove/add different sections).

knowing weather is good for planning! especially info about air quality, UV index and allergens.

helps with starting an algorithm: checking the weather - picking right clothes - taking things for this weather (gloves, umbrella, allergy meds etc.) - going outise.

multiplatform: no quick: yes colorful: depends on your system theme works offline: no

(!!!) if i don't see something right away, it does not exist for me. this rule applies for both physical and digital spaces. so i need something right on my screen!

i use it for pictures that inspire me to draw. kinda making traps for my artistic attention! :P

ambient noise player. absolutely necessary to use while outside: city's overwhelming noises are horrible.

it has a sleep timer as well: for example, i put 1hr timer for this to play, so it wouldn't drain my phone's battery all night when i fall asleep.

i especially like cat noises, walking on the snow, and wind chimes.

visualizations! not too bright, not too quick. they're relaxing and gentle. could be used as a "screensaver" of kinds.

multiplatform: no quick: yes colorful: no (but green is my favorite color) works offline: yes

previously i used Soothing Noise Player

helps to build comfortable environment. options to hide apps (entirely or leave them visible only for search), customize main page only with favorite icons and widgets! you can change shape of icons too, which adds novelty :)

multiplatform: no (irrelevant here) quick: depends on your settings colorful: depends on your system theme works offline: yes

as a person cursed by visual thinking, i depend on widgets. nothing on the screen? nothing to do! (kill me.)

as one AuDHD person said: "after my brain gets used to seeing something in one place for too long I don't notice it anymore. So a sticky note will work for about a week. Then my brain no longer notices it." and i agree with it. this is why changing colors and size is so important for me.

if you feel like you got used to some widget or colors, change them. make it stimulate your brain again.

and this one has 3 widgets: today's date, agenda, month view (with events). the most important part: you can resize fonts and widgets, choose colors and background opacity. helps when you need a reminder to scream in your face right at your home page. and yes, you have the whole color wheel.

as for the app itself: even more colors customization, events/tasks, different views: month, week, agenda, day, month + agenda (split view).

multiplatform: android + CalDAV quick: YES! colorful: YES! works offline: yes

because i keep forgetting to take my meds. dumbass.

colors, icons, tags. notifications are colored (the color i chose for certain medications).

multiplatform: no quick: yes colorful: yes works offline: yes

suggestion from the comments: Pillo

summer: to hide from the sun. winter: to walk outside while it's not too dark.

multiplatform: no quick: yes colorful: not really?.. works offline: no

this one works only if i change colors and break notification text, and restricting number of available "snoozes".

i like that it shows how long ago i've made a previous break.

multiplatform: no quick: yes colorful: kinda yes? it has one color, but you can change it works offline: yes

i used this one before i switched to Break Timer.

forces me to pause with its annoying full-screen reminder! but this irritation is exactly what helps me to stop.

multiplatform: no quick: yes colorful: depends on the colors you chose works offline: yes

(!!!) customizable af. i removed recommendations and trending page. only videos from channels i follow or something i really want to find.

downloading in different formats, making a queue, playing at background, picture-in-picture, no account needed. views history back-up!

multiplatform: no quick: YES! colorful: no (it's a plus here) works offline: no (duh!)

it is still in development, but already better than YT, especially UI.

standalone app, not a page in browser (where i have a temptation to check other websites). isolated environment for one certain task reduces the risks of being distracted.

multiplatform: yes (but i use it only for Desktop) quick: kinda no... colorful: no (it's a plus here) works offline: no (duh!)

(!!!) i honestly hate Tumblr UI, its load time, ads and login-wall. so slow, so infuriating.

remember that frog on login requirement notice? i hate it with all of my heart now. i'm sorry, Tumblr frog. it's not your fault.

though Tumblr itself is a risk, i try to not stuck there.

multiplatform: yes (web) quick: YES colorful: no (it's a plus here) works offline: no (duh!)

despite it having many privacy settings, this browser actually simplifies everything.

turning off JS, ads, DRM, third-party assets makes pages lightweight. yes, sometimes it breaks things, but if i need less stimulation, it doesn't matter. i can always save links for later if they don't work correctly in this browser.

multiplatform: no quick: YES! colorful: no (it's a plus here) works offline: no (duh!)

very simple, but works. i hate having too many (unwanted!) details.

h/t to Gwrvan Barré for recommendation!

(!!!) posting page is simple and stripped from distractions. markdown is default, but you can use HTML elements too.

i don't like social aspects of microblogging, but i like making public text posts. also i dislike complex setups. so this thing is perfect for me.

customization is hidden in menu, which means you won't be tempted to endlessly tinkering your CSS.

cool for export/archiving if you have a website! or local copies.

multiplatform: yes (web) quick: YES! colorful: depends on your CSS works offline: no

works only if i stop endlessly changing, fixing CSS. also being chill about my blog and not trying to be "serious writer" helps.

quick markdown editor, drafts, publish/unpublish, export as .md files, pre-made themes (means i'm not stuck with creating CSS myself), lightweight!!!

multiplatform: yes (web) quick: YES! colorful: depends on your CSS works offline: no

to quickly write down something stupid at 3am.

tags and colors are helpful for balanced stimulation and categorization! i personally add emoji to the tags for better visuals as well.

good amount of text formatting: not distracting, not limiting.

the best feature is: note reminders. you can make one-time or reoccurring reminders with linking to the certain note. so it's not just a notification with "go study you dumbass", it's "go study you dumbass, and here's the detailed note with instructions you wrote earlier."

multiplatform: no quick: YES! colorful: yes works offline: yes

honorable mention: Notally (original project). o7

(!!!) stimulation is balanced: colors, icons, adding pictures to notes, markdown.

widget with the short list of previous notes. optional reminders (mine are once/week), with custom description.

you can even choose a custom font from your own files! to add crazy-ass font... or maybe more readable one.

also has a cute option to make a postcard. ^w^

multiplatform: no quick: YES! colorful: yes works offline: yes

grid view, folders, tags and workplaces (with optional sharing), adding images.

multiplatform: yes quick: yes colorful: no (but my favorite color is green, so i like it) works offline: no

it's just a blank page and my words, fullscreen. exactly what i need.

multiplatform: no quick: YES! colorful: NO! works offline: yes

will use it 'till i die. i hate slow loading of more "advanced" code editors. perfect for simple coding. has custom color themes.

doesn't have a split view, so you need to manually update the local web page to see the changes.

multiplatform: no quick: YES! colorful: depends on your theme works offline: yes

interesting and random info. basically a rabit hole, but helps if used correctly.

same as Wikipedia, but not as random: it focused on tutorials. i like reading simplified human-curated guides about different things.

making something with my hands helps A LOT. physical activity is good for grounding when i'm stuck in my head.

and crafting always means free stimulation B)

images, colors and randomness. i can't stand gifs and short videos, but i like looking at pictures. saving them feel like collecting cool rocks.

beware of flashing lights!

visualizations for music. really captivating and stimulating. not all of them are pleasant, but i have a few that i like.

P.S. for other (unofficial) versions and platforms check their github repository.

honorable mention: old Windows Media Player visualizations. o7