Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 770 061
2) Placement test : grammar for beginners (lucile83) 5 977 910
3) A/AN (webmaster) 5 355 970
4) Auxiliary BE (webmaster) 3 219 773
5) Present continuous (webmaster) 2 993 087
6) Present simple (webmaster) 2 895 084
7) Present simple (webmaster) 2 591 860
8) Present continuous (webmaster) 2 422 504
9) Adjectives (webmaster) 2 090 821
10) A/an (anonyme) 2 010 259
11) Present perfect simple (webmaster) 1 633 880
12) Vocabulary - Placement test (bridg) 1 616 916
13) Preterite (webmaster) 1 613 166
14) Short placement test (webmaster) 1 441 421
15) Preterite (webmaster) 1 438 469
16) To be (bridg) 1 403 081
17) What time is it? (webmaster) 1 346 161
18) Present perfect (webmaster) 1 337 887
19) The alphabet in English (webmaster) 1 318 459
20) Adjectives (lucile83) 1 212 956
21) What time is it? (webmaster) 1 203 255
22) Numbers (webmaster) 1 186 956
23) 'A' ou 'An' (anonyme) 1 171 398
24) Two presents: present continuous, present simple (webmaster) 1 145 454
25) To be (bridg) 1 143 217
26) Comparatives / Superlatives (webmaster) 1 094 225
27) Numbers (webmaster) 1 068 056
28) CAN / MUST (webmaster) 1 056 737
29) THE/ A / AN / nothing (webmaster) 1 028 348
30) Comparatives (webmaster) 1 005 335
31) Family life (bridg) 998 398
32) Numbers > 100 (webmaster) 984 808
33) Future (going to/will/present continuous) (anonyme) 960 042
34) Plural (webmaster) 953 734
35) Superlatives (webmaster) 872 983
36) Adjectives (anonyme) 872 688
37) Simple present (bridg) 851 495
38) Spelled words N°1 (bridg) 848 092
39) Placement test beginners: Check your spelling (lucile83) 829 151
40) Introducing oneself (webmaster) 825 962
41) Adverbs of frequency (lucile83) 813 795
42) Family (bridg) 782 856
43) General test-End of high school / Beginning of university (webmaster) 780 622
44) Frequency adverbs (webmaster) 776 231
45) Present simple (lucile83) 775 794
46) Present BE + Ving (bridg) 762 554
47) Genitive (webmaster) 721 952
48) Family tree (anonyme) 717 756
49) Preterite: simple or continuous? (webmaster) 713 904
50) Passive form (lucile83) 708 338
51) Placement test (beginners) (lili73) 699 025
52) Past simple or present perfect (lucile83) 689 474
53) Future (webmaster) 674 659
54) 2 Preterites (webmaster) 659 458
55) Present perfect simple (bridg) 655 393
56) Preterite (webmaster) 616 893
57) List of 200 irregular verbs and audio (bridg) 613 972
58) Modals (webmaster) 611 547
59) Spelled words N°2 (bridg) 607 633
60) Height (webmaster) 605 341
61) Modals (webmaster) 601 343
62) Articles a / an / the (lucile83) 596 694
63) Plural forms (bridg) 575 652
64) Nationalities (webmaster) 573 012
65) Past continuous / Past simple (anonyme) 559 536
66) Irregular plurals (bridg) 552 074
67) Two presents: simple and continuous (webmaster) 548 056
68) Preterite (bridg) 547 265
69) Vocabulary: greeting people (here4u) 536 342
70) Superlatives (frapedur) 532 951
71) Give your opinion (bridg) 530 509
72) Adverbs of Frequency (bridg) 515 878
73) Present simple or continuous (lucile83) 505 359
74) Present perfect / preterite ? (anonyme) 504 462
75) Possessive case (anonyme) 479 311
76) Countries & nationalities (bridg) 471 764
77) 'The' or nothing? (webmaster) 470 246
78) Introducing oneself (easy) (webmaster) 469 895
79) Past tenses (bridg) 468 662
80) Passive voice (webmaster) 460 674
81) Present Simple vs. Past Simple (anonyme) 452 810
82) Questions : how to ask them (lucile83) 446 746
83) General Test II / End of high school / Beginning of universi (webmaster) 445 177
84) IN, ON, AT or TO? (webmaster) 443 559
85) Relative pronouns (webmaster) 442 600
86) Comparative of superiority (lucile83) 435 678
87) How to pronounce the final -ED? (past simple) (webmaster) 435 046
88) Relative clauses (webmaster) 422 049
89) Sounds: [h] (webmaster) 418 729
90) Comparative (anonyme) 411 071
91) A/an/Ø (bridg) 396 568
92) Future simple (lucile83) 394 411
93) This / That / These / Those (webmaster) 391 576
94) Past simple (anonyme) 390 582
95) Conditional (webmaster) 390 171
96) Passive voice (anonyme) 388 842
97) Comparing (webmaster) 387 282
98) Can / could/ may/ might (woodyrun) 378 110
99) Present perfect or past tense (anonyme) 374 765
100) Personal pronouns (anonyme) 370 804
101) Much, many, little and few (felin) 369 761
102) Some, any, no, enough, too/too much/too many (webmaster) 367 360
103) Preterite continuous (BE + -ING) (webmaster) 366 646
104) Genitive case (bridg) 366 384
105) Confusing words - Placement test (bridg) 364 058
106) Irregular verbs (webmaster) 362 482
107) Numbers from 1 to 10 (lucile83) 360 729
108) Past perfect simple, past perfect continuous (anonyme) 360 312
109) Present continuous or present simple (webmaster) 358 880
110) Present perfect or preterite? (anonyme) 353 636
111) Comparative Adjectives (bridg) 351 403
112) Simple Past : regular verbs (anonyme) 351 184
113) Who, Whom, Which, or Whose? (anonyme) 347 538
114) Past simple (video) (lucile83) 346 398
115) Past simple or past continuous (lucile83) 338 160
116) What time is it? (webmaster) 336 806
117) Modals (tinou) 335 709
118) While / When (anonyme) 335 401
119) Modal: may/might (lucile83) 333 358
120) Cardinal and ordinal numbers (anonyme) 327 811
121) Possessive adjectives and pronouns (woodyrun) 322 960
122) The superlative (anonyme) 321 868
123) How to talk about the weather (lili73) 320 790
124) Since and for (lucile83) 317 586
125) Flags (webmaster) 316 794
126) Irregular verbs (bridg) 315 111
127) Prepositions - in, on, at (anonyme) 313 544
128) Pronouns (woodyrun) 310 760
129) Tenses (anonyme) 310 236
130) Placement test 3 (webmaster) 309 801
131) Order of adjectives (webmaster) 305 476
132) Could/Couldn't (laure95) 305 079
133) Adjectives and prepositions (lucile83) 303 618
134) Comparative (anonyme) 303 590
135) Agreement Tags (webmaster) 303 332
136) Asking questions (webmaster) 302 219
137) Present perfect OR simple past? (bridg) 297 697
138) Questions in the past tense (lucile83) 296 524
139) Superlative Adjectives (bridg) 294 756
140) Uncountable nouns (webmaster) 294 594
141) Object pronouns (bridg) 293 055
142) Placement test 1 (lucile83) 291 761
143) Present simple (lucile83) 289 255
144) Prefer/rather (bridg) 288 387
145) Can/Must/Should (laure95) 287 762
146) Passive form (anonyme) 286 700
147) Must or Have to? (woodyrun) 285 830
148) The/an/nothing (bridg) 284 159
149) Past perfect (lili73) 284 079
150) To be (anonyme) 282 891
151) Vocabulary: asking and answering (here4u) 280 365
152) Can and can't (laure95) 278 459
153) Modal verbs (bridg) 276 714
154) Some / Any / no... (bridg) 269 465
155) Days of the week (bridg) 268 881
156) So / neither (anonyme) 263 675
157) Past simple (video) (lucile83) 263 084
158) Used to (bridg) 259 975
159) Past tense (anonyme) 258 632
160) Vocabulary: on the phone (here4u) 258 631
161) Should / must (anonyme) 258 498
162) Find out a quantity (webmaster) 258 281
163) Superlative + and adjective (lucile83) 256 252
164) Present continuous (chnawa) 255 813
165) Articles : a / an / the / Ø (anonyme) 253 029
166) Numbers 1/100 (anonyme) 252 666
167) Comparative and superlative (anonyme) 252 450
168) Modal can (video) (lucile83) 252 364
169) Relatives pronouns (who, which, that...) (anonyme) 247 718
170) Vocabulary: at the restaurant (here4u) 245 570
171) A few, a little, few, little (anonyme) 243 922
172) Would rather / would prefer to (anonyme) 243 744
173) Present continuous and the Going to form (anonyme) 241 917
174) Comparatives (anonyme) 241 516
175) Have something done (anonyme) 239 250
176) Should/ have to/ must (anonyme) 238 385
177) The past (webmaster) 237 447
178) Future continuous and future perfect. (felin) 237 043
179) Used to/would (woodyrun) 236 177
180) How to ask a question in English (bridg) 233 922
181) I wish, if only (felin) 233 631
182) Pluperfect (webmaster) 233 162
183) Countable or Uncountable? (webmaster) 232 499
184) Present simple or continuous (bridg) 230 727
185) Should / shouldn't (anonyme) 230 631
186) Some / any (younes91) 230 283
187) Adjectives - ing and ed (felin) 228 213
188) Hypothesis (webmaster) 227 338
189) Auxiliary BE (lucile83) 225 924
190) Articles a/an/the/0 (bridg) 225 767
191) Article The or nothing (anonyme) 225 336
192) Present perfect with Ever - never - (anonyme) 224 852
193) Present continuous OR Present simple? (bridg) 224 750
194) Must or mustn't (laure95) 223 367
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 338
196) Present perfect (bridg) 218 913
197) To / in order to / so as to / so that (irish21) 218 768
198) What time is it ? (anonyme) 217 160
199) Indirect speech (bridg) 215 165
200) Comparison (komiks) 214 203
